Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel

Log In

A valid email is required.
Password is required.
Site Notices
6.8SPC FAQ (Page 1 of 3)
Arrow Left Previous Page
Page / 3
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 25
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 25
  • Location USA VA, USA
Offline
Posted: 11/21/2007 9:48:18 PM EST
[Last Edit: 11/5/2015 8:44:32 PM EST by VA-gunnut]
Figured compiling the important info out there into one document would be helpful to people trying to make informed decisions regarding this round in the AR-15 platform.

Any info not accurate or missing that you can provide or you think should be include please post. I will try to keep it updated.

Hope this is useful.

Tim Welter


The 6.8 Remington Special Purpose Cartridge
6.8 SPC


Manufactures of 6.8 Uppers and Complete Rifles:

Lewis Machine & Tool – Both / Piston Soon
Bushmaster – Both / Piston also
CMMG – Both
Precision Reflex Inc – Both
Barrett Rifles – Both
DPMS Panther Arms – Both
J&T Distributing – Full Kits
MGI – Both / QCB
Robinson Armament Co. – XCR Rifle
Rock River Arms – Both & Kits
Stag Arms – Both and Lefties
Land Warfare Resources Corp. (LWRC) – Both / Piston
Noveske Rifleworks – Both
Model 1 Sales – Kits (barrels not recommended)
Olympic Arms – Both
SSK Industries – Both


Builders of Custom to Order Uppers and Complete Rifles:

AR15 Barrels – Uppers
White Oak Armament – Uppers
Denny’s Guns / Global Tactical Supply – Both
JTAC Tactical Supply – Both
Ko-tonics – Both
Mid-South Tactical Network (MSTN) – Both
Rainier Arms – Both
Talon Arms Custom – Uppers
Maybe others


6.8 SPC Chambers Available:

1: SAAMI / 0.05 " throat / akin to .223 standard
2: SPC II / 0.10" throat / akin to 5.56 NATO
3: DMR (only offered as a custom) / 0.08" throat & a 30 degree case to leade taper instead of 45 degrees / akin to .223 Wylde


Barrels of Manufactures of Uppers & Rifles: Twist / Rifling / Groove / Chamber / Stainless or Chrome Lined / M4 Extended Cuts / Thread Pitch

Lewis Machine & Tool sub to Mike Rock – 10:1 / standard /standard / SAAMI / chromed & stainless / M4 / 5/8X24
Ko-tonics - 11:1 / standard shallow / 4 groove / SPC II / chromed / M4 / 5/8X24
Bushmaster – 10:1 / standard /standard / SAAMI / ? / proprietary ramps "M2" / ?
CMMG – 10:1 / standard /standard / SAAMI / Chromed / Both Option / 5/8X24
Barrett Rifles – 10:1 / standard / standard / SPC II / Chromed / ? / 5/8X24
Precision Reflex, Inc. (PRI) – 10:1 / standard /standard / SPC II / stainless / M4 / 5/8X24
DPMS Panther Arms – 10:1 / standard /standard / SAAMI / chrome- moly and NOT Chromed / M4 / 1/2x28
JTAC Tactical Supply – 10:1 / standard /standard / SAAMI / Stainless & Chrome-moly, no chromed / M4 / 5/8X24
MGI – uncertain supplies change - M4 / 5/8x24
Robinson Armament Co. – 10:1 / standard / standard / SPC II / chromed / ? / 5/8X24
Rock River Arms – 10:1 / standard /standard / SPC II / chrome- moly and NOT Chromed / ? / 5/8X24
Stag Arms – 10:1 / standard /standard / / SPC II / chromed / Not M4/ 1/2x36
Land Warfare Resources Corp. (LWRC) – Sub to Shaw – 10:1 / standard / standard / SPC II / chromed / M4 / 5/8X24
Noveske Rifleworksthese are Pac-Nor blanks he chambers and profiles -10:1 / standard /polygonal / SAAMI / stainless / M4 / 5/8X24
Model 1 Sales – 9.5:1 / standard / standard / SAAMI / Chromed / Not M4 / 1/2x36 NOT RECOMMENDED: too fast twist rate
Olympic Arms – 10:1 / standard / standard / SAAMI / stainless / M4 / ?
SSK Industries – customer choice / ? / ?



Barrel Makers & Barrel Smiths: Twist / Rifling / Groove / Chamber

Shaw: 10-11:1 / standard / 6 groove or 4 groove / old SAAMI present & future SPC II
Rock Creek OEM: 10:1 / standard /6 groove / SAAMI
Rock Creek Custom: custom / 5R / 5 groove / chambering not offered
Noveske Rifleworks: 10:1 / polygonal / 6 groove / SAAMI
Hart: 10:1 & 12:1 / standard / 6 groove / reamer of your choice
Krieger: Custom/ Custom / Custom / reamer of your choice
Douglas: 10:1 & 12:1 / standard / 6 groove / SAAMI may be able to supply reamer or have done
Wilson: 10:1 & 11:1 / standard / 6 groove / SAAMI
White Oak Armament: See Wilson also use other custom blank but cut a SAAMI chamber
Compass Lake Engineering: See Wilson also use other custom blank but cut a SAAMI chamber
Bartlein: Custom / standard / custom / reamer of your choice
Lawton: Custom / standard / custom / reamer of your choice
Lilja: 10:1 & 12:1 / standard / 10:1 3 & 4 groove 12:1 6 groove / chambering not offered
Shilen: 10:1 / standard / 6 groove
Spencer: 10:1 & 12:1 other possible/ standard / 6 groove / reamer of your choice
Lothar Walther: 10:1 / standard / 6 groove / chambering not offered
Pac-Nor: custom / standard and polygonal / custom / reamer of your choice



Barrel Configurations & Useable Ammo: Twist / Chamber (SAAMI, Improved SAAMI, DMR)


10:1 / SAAMI / Most makers (see list above): all presently no restricted manufactured ammunition. hand loads not exceeding recommended published max Warning: DO NOT USE SSA Combat or Old Extreme

11:1 / SAAMI / (see list above): Must test individual barrel results will vary but indications are most do handle all presently manufactured ammunition to include SSA Combat, hotter loads, maximum hand loads (always start low), Warning: DO NOT USE SSA Extremes no longer in production

10:1 / SPC II / (see list above): all loads, hotter loads, SSA Combat loads and all versions of SSA Extreme, maximum hand loads (always start low)

11:1 / SPC II / (see list above): all loads, hotter loads, SSA Combat loads and all versions SSA Extreme, maximum hand loads (always start low),

10-12:1 / DMR #3 / custom ( no factory offerings): all loads, including SSA Combat loads and all versions SSA Extreme, maximum hand loads (always start low),


Grooves

The number of grooves in combination with chamber configuration and twist rate has not yet been thoroughly tested to make a definitive statement on its entire effect on the different configurations above so therefore has been left out. That being said their stands a large amount of evidence that reducing the number of grooves and lands, as well as changing their basic form (5R, Polygonal, 5C), does reduce pressure. This can cause increases in velocity because of the ability to increase the charge in the case of said ammunition without experiencing over pressure.




6.8 Uppers Evaluation Report Link







Velocity Differences of Bullet in Different Length Barrels

SSA 2nd generation 115 gr SMK OTM w/cannelure, 5 shot averages:

20” barrel: ave vel = 2561 fps; 10 fps extreme spread

16” barrel: ave vel = 2525 fps; 18 fps extreme spread –– lost 36 fps from 20"

12.5” barrel: ave vel = 2384 fps; 12 fps extreme spread –– lost 141 fps from 16"

10” barrel: ave vel = 2265 fps; 27 fps extreme spread –– lost 119 fps from 12.5"

7.5” barrel: ave vel = 2035 fps; 27 fps extreme spread –– lost 230 fps from 10"
––––––––––––––––––––––––––––––––––––––––––­––––––––––––––––––––––––––––––––––––––––––­––––––––––––––
20" barrels: Rifle Length Gas System.
18": Midlength Gas System.
16" barrels: Best with Midlength Gas System, but will also work with Carbine Length.
14.5" barrels and below: Carbine Length Gas System.
from PaulSantos


Loaded Ammunition Manufacturers:

Remington
115 grain Open Tip Match [BC .344]
115 grain Metal Case [BC .292]
115 grain Boat Tail Hollow Point Match [BC .333]
115 grain Core-Lokt Ultra Bonded [BC .295]
http://www.remington.com/products/ammunition/ballistics/comparative_ballistics_results.aspx?data=R68R1*R68R2*RM68R1*PRC68R4]Ballistics for Remington 6.8 Ammo [24" test barrel][/url]

Hornady
110 GR V-MAX [BC .370]
110 GR BTHP/WC [BC ~.352]
https://www.hornady.com/shop/?page=shop/browse&category_id=55410454d3b6c1edb710ea593c0e033d]Ballistics for Hornady 6.8 Ammo [16" test barrel][/url]

Silver State Armory
110 grain Barnes Triple-Shock X-Bullet [BC .323]
110 grain Sierra Pro Hunter Bullet [BC .314]
115 grain Sierra OTM Match King bullet [BC .324 to .317]
115 grain Seirra OTM Combat (special order restricted item) [BC .324 to .317]
95 grain fragmentation bullet [BC ?]
97 grain AP (ARMOR PIERCING) restricted item - Law Enforcement & Military only
115 grain Extreme Copper Plated (WARNING: no longer made but may still be found)
115 grain Extreme Combat Copper Plated (WARNING: no longer made but may still be found)
Ballistics for SSA 6.8 ammo from a 16” test barrel


Ammunition Reloading Components:


Bullets available for the 6.8 SPC:


Remington
115 grain Premier Core-Lokt Ultra Bonded Pointed Soft Point [BC .295]
115 grain Remington Express Metal Case [BC .292]
.277 caliber bullet list

Hornady
110 grain V-MAX [BC .370] - length 1.036
110 grain Hollow Point [BC .352]
130 grain Soft Point InterLock [BC .409]
130 grain SST InterLock [BC .460] - length 1.248

.277 caliber bullet list


Barnes
110 grain Barnes Triple-Shock X-Bullet [BC .323] - length 1.086
120 grain Banded Spitzer BT [BC .438] - length 1.294
110 grain Barnes Tipped Triple-Shock-X-Bullet

Sierra
90 grain Varminter [BC .203 to .219]
110 grain Pro Hunter [BC .314] length 0.944
115 grain HPBT MatchKing [BC .324] - length 0.991
130 grain SBT GameKing [BC .402]
130 grain SPT Pro Hunter [BC .383] - length 1.098
135 grain HPBT MatchKing [BC .440] - length 1.265
140 grain SBT GameKing [BC .437 to .412]
140 grain HPBT GameKing [BC .366 to .390]
150 grain SBT GameKing [BC .462 to .435]
.277 caliber bullet list

Woodleigh
130 grain Protected Point [BC .409] - length 1.087
150 grain Protected Point [BC .463] - length 1.209
.277 caliber bullet list
Retail supply

Swift
130 grain Scirocco II bonded [BC .450] - length 1.315
130 grain A-Frame SS Bullet [BC .323] - length 1.090
140 grain A-Frame SS Bullet [BC .414] - length 1.190
150 grain A-Frame SS Bullet [BC .444] - length 1.230
Rifle Bullets list

Speer
90 grain TNT HP [BC .275]
100 grain Jacketed HP [BC .225]
130 grain Grand Slam SP [BC .345]
130 grain Hot-Cor Spitzer SP [BC .408]
130 grain Spitzer BTSP [BC .449]
140 grain Trophy Bonded Bear Claw SP [BC .392]
150 grain Grand Slam SP [BC .385]
150 grain Hot-Cor Spitzer SP [BC .481]
150 grain Spitzer BTSP [BC .496]
.277 caliber bullet list

Nosler
New 6.8 Bullet 110 grain AccuBond [BC. ?]
130 grain Nosler Solid Base [BC. 420]
130 grain Nosler Ballistic Tip [BC .433] - length 1.215
130 grain Nosler AccuBond [BC .435] - length 1.245
130 grain Nosler Partition [BC .416] - length 1.135
140 grain Nosler Ballistic Tip [BC .456]
140 grain Nosler AccuBond [BC .496] - length 1.310
140 grain Nosler Partition [BC .432] - length 1.190
150 grain Nosler Ballistic Tip [BC .496] - length 1.350
150 grain Nosler Partition [BC .465] - length 1.250
160 grain Nosler Partition [BC .434] - length 1.300
.277 caliber bullet list

Winchester
130 grain Super-X Power-Point Bullet [BC .372]

KJG by Lutz Moeller
(Das Kupferjagdgeschoß - the copper hunting projectile)
95.7 grains [BC .426] - length 1.18 inches [load data in German]


Lost River Ballistic
135 grain J36 Hunting Bullet [BC .649] - length ~1.35?

Sako
130 grain HammerHead Bullet

Norma
130 grain SP [BC .359]
150 grain SP Bullet Oryx Bonded [BC .373]

Kodiak Bullets
Available here and here.
130 grain Bonded Jacketed Pointed Soft Point [BC .494]

GS Custom Bullets
80 grain High Velocity monometallic copper bullet - length 0.858
110 grain High Velocity monometallic copper bullet - length 1.157
120 grain High Velocity monometallic copper bullet - length 1.256



Powders Tried in the Current Reloading of 6.8 SPC:

RL 7
RL 10X
H322
H335
H4198
H4895
AA2520
Varget
WCC844
IMR 4895
AA2230
X-Terminator
Benchmark
Ramshot TAC
VV N135
VV-N133
AA 1680


The best powders seem to be these below:

H332, Benchmark, RE10x, H335, X-Terminator, AA2230 for bullets 110-130 grains
H322, H4198, RE7, H335, and X-Terminator for bullets 90-100 grains


Brass used for the 6.8 SPC:

Remington: Large primer pocket (average quality / weaker than small primer pocket and holds less powder)
Hornady: Small primer pocket (better quality / brass on the soft size smaller powder capacity)
Silver State Amory (SSA): small prime pocket (best quality / strong brass / largest powder capacity / many reloads / still needs to be properly prepped)


Links To Other Resources

6.8 Uppers Evaluation Report Link

6.8 SPC Resource/FAQ Page

6.8 SPC Reloading Resources (including recipes)

Original 6.8 Thread (Archived - Members Only)

6.8 Thread Part II (Archived - Members Only)

6.8 Thread Part III

Zak's FAQ

6.8SPC.com (Randall's FAQ/List of Links)

2004 NDIA Small Arms Symposium Presentation on the 6.8 SPC (Power Point File)

Wikipedia Entry for 6.8 SPC

Yahoo 6.8 SPC Group

6.8 Remington SPC Forum

Barrett's 6.8SPC Forum



Links to Reloading Data

Burn Rate Chart

Zak's Reloading Data

Hodgdon's 6.8 SPC Reloading Data

IMR's 6.8 SPC Reloading Data


Preferred Muzzle Thread Pattern: 5/8-24


Dimensions of the 6.8 SPC
**************new case––-resized case ––-SAAMI––––––-SPCII––––––-DMR
base dia. ******* .4155***** .418**** * .422***** .422 ***** .4205
shoulder dia. ***** .402 * ** .402 ***** .4028**** * .4028 **** .403
neck @ shoulder dia* .301 *** .301 **** .3085**** .3085 ***** .305
neck @ throat dia ** .301 *** .301****** .307 ***** .308 **** .304
leade dia. ***************** ********* .2781**** .2781 **** .277
length of leade ******************** ** .064**** .105 ****** .095



Trim To Length = 1.676" (from Hodgdon Powder Co)

Note from Art (kalwasart): You will have to work to the bottom of the spec otherwise the case will not work in a DPMS or CMMG weapon.

6.8 SPC Magazines: Over all best quality has been PRI and also gives you the the largest OAL for ammo, C-Products comes in second because of some feed lip adjustment issues and a shorter OAL for ammo. Barrett has not had enough feed back yet but seem to be good quality as well not sure on OAL for ammo.

6.8 SPC Magazines Specs:

PRI: 5, 10, 15, 25 round capacities / Round OAL Dimension: 2.3"
Barrett: 30 round capacity Round OAL Dimension: 2.2?"



Suppressors

The 6.8 SPC can use suppressors designed for the .308 as the size is only slightly larger in bore size and are cut to the prevalent 5/8x24 thread pitch. The only draw back to this is that .308 suppressors tend to be both longer and heavier. There are a number of companies that now make dedicated 6.8 SPC suppressors. These are 5.56 NATO suppressors with the bore increase and the thread pitch changed to the 6.8 SPC specs. If you happen to have one of the barrels cut to a a thread pitch other than 5/8x24 you can, have an adapter made, have the suppressor's thread pitch changed, have your barrel threads re-cut ( may require shortening of barrel) , purchasing a new barrel. It is not advisable to have the suppressors threads changed to match your thread pitch as the 5/8th pitch seems to becoming the standard. This would cause you to have all your future barrels threads custom cut to the other thread pitch. Below are the Manufactures (linked) and models of available suppressors dedicated to 6.8 SPC cartridge:

Under Construction





Choosing the Proper .277 Bullets for Use in the 6.8SPC
Writen By User Screen Name: PauloSantos



INTRO:
I have put together this thread as an informative thread for the new guys or anyone else who needs help with selecting the correct .277” bullets for reloading for the Remington 6.8SPC.

Before I begin, I just want to touch up on the Remington 6.8SPC. If you are using the 6.8SPC in an AR-15, there is an OAL that you have to keep in mind. With the C-Products and Barrett magazines, I would not load the ammo longer than 2.260" to load reliably. If you have PRI magazines, I would not load the ammo longer than 2.280". Also, due to the limited powder capacity, it is best to load bullets in the range of 90-115 Gr., although you can load some of the 130 Gr., you will be hard pressed to get velocity over 2200fps.

POWDERS:
So far, I have tested a boat load of powders and the best powders are definitely the medium-fast powders such as H322. As far as velocity, I've found that for the 90-100 Gr. bullets, the H4198 is hard to beat and it is very accurate. H4198 is ok for the 110 Gr. bullets, but the velocity is not as good as the H322 and you will need a light buffer or else you may have cycling problems, especially with the rifle length buffer tubes. If given a choice, I would start with the Hodgdon Extreme Powders since they are very accurate and they are not as sensitive to temperature changes as some of the other powders. Also, I would prefer a extruded powder over ball powder since they are generally more accurate.

Best Powders for 90-100 Gr. Bullets:
1. H4198.
2. H322.
3. H335.
4. X-Terminator.
5. Reloaders 7.

Best Powders for 110-135 Gr. Bullets:
1. H322.
2. Benchmark.
3. Reloaders 10x.
4. 2015.
5. H335.
6. N133.
7. X-Terminator.
8. TAC.
9. 2230.

RIFLE TWISTS:
The two most popular twists for the Remington 6.8 SPC are the 1:11" twist and the 1:10" twist. Both twists can handle bullets from 90-135 Gr., but the 1:11" twist is supposed to reduce the pressure and is quickly becoming the popular choice.

BULLET TYPES:
1. FMJ-Full Metal Jacket (Ball Ammo). Unknown at what velocity the Remington FMJ fragments, but the SSA Extreme FMJ is supposed to fragments at 2100+ fps.
2. OTM-Open Tip Match.
HP-Hollow Point.
SMK-Sierra Match King. Generally fragments at 2100+ fps.
3. SP-Soft Point. Generally expands at 1700+ fps.
4. BT-Ballistic Tip. Generally expands or fragments at 1900+ fps.

NOTE: You may see the letter "BT" (Boat-Tail) in front or after the above ammo types. BT stands for "Boat Tail" and refers to the base of the bullet. A "Boat Tail" is a sloping end which narrows gently at the base of the bullet, so that the cross-section resembles the shape of a boat's hull. The boat tail shape reduces drag on a bullet, helping it to retain velocity and resist deflection from crosswinds, but causes the bullet to take longer to "settle" after leaving the barrel compared to a standard "flat-base" bullet. Boat tail bullets are usually selected for long-range shooting, while the flat-base bullet shape tends to be more accurate at short ranges. A "HPBT" bullet is a "Hollow Point Boat Tail" bullet.

The last thing I would like to explain is a "Cannelure.” A Cannelure is a cut or pressed groove (or grooves) around the shank of a bullet. Cannelures provide an area into which the case mouth may be securely crimped. Military ammo has cannelures to prevent bullet set-back. Bullets with cannelures are not generally used in match ammo because cannelures may decrease the accuracy of the bullet. For Military/LE purposes, bullets with cannelures are preferred. For sniper type applications, bullets without cannelures are usually used.

HOME PROTECTION/SHTF:
Penetration and Fragmentation are key for Home Protection/LE applications. 10-12" is ideal to ensure that it will reach the vital organs.

1. Hornady:
a. 100 Gr. SP.
b. 110 Gr. V-Max.
c. 110 Gr. HP.

2. Remington:
a. 100 Gr. SP.
b. 115 Gr. FMJ.

3. Sierra:
a. 110 Gr. SPT.
b. 115 Gr. SMK.

4. Silver State Armory:
a. 115 Gr. SMK Enhanced Fragmentation Version.

BARRIER PENETRATION BULLETS:

1. Barnes:
a. 110 Gr. Barnes XXX.
b. 110 Gr. Barnes tipped XXX.

2. Nosler:
a. Accubond 110 Gr. Spitzer.
b. Accubond 130 Gr. Spitzer.
c. Ballistic Tip 130 Gr. Spitzer.

3. Remington:
a. 115 Gr. Core Lockt SP.

4. Sierra:
a. 110 Gr. SPT.
b. 130 Gr. SPT.
c. 130 Gr. SBT.

5. Speer:
a. 130 Gr. SP.
b. 130 Gr. BTSP.

HUNTING BULLETS:
For hunting bullets that expand/mushroom are preferred because they don’t damage too much meat like the fragmenting bullets.

1. Barnes:
a. 110 Gr. Barnes XXX.
b. 110 Gr. Barnes tipped XXX.

2. Hornady:
a. 100 Gr. SP.
b. 110 Gr. HP.
c. 130 Gr. Interbond.
d. 130 Gr. SST.
e. 130 Gr. SP.

3. Nosler:
a. Accubond 110 Gr. Spitzer.
b. Accubond 130 Gr. Spitzer.
c. Ballistic Tip 130 Gr. Spitzer.

4. Remington:
a. 100 Gr. SP.
b. 115 Gr. Core Lockt SP.

5. Sierra:
a. 90 Gr. HP.
b. 110 Gr. SPT.
c. 130 Gr. SPT.
d. 130 Gr. SBT.

6. Speer:
a. 100 Gr. SP.
b. 100 Gr. HP.
c. 130 Gr. SP.
d. 130 Gr. BTSP.

MATCH/COMPETITION/SNIPER BULLETS:

1. Hornady:
a. 110 Gr. V-Max.
b. 110 Gr. HP.

2. Sierra:
a. 115 Gr. SMK.
b. 135 Gr. SMK.

3. Speer:
a. 90 Gr. TNT.

Note: Cannelures are generally not used because of possible accuracy loss.

VARMINT HUNTING:
Varmint Hunters want a bullet that offers great accuracy and rapid expansion. Some of the best bullets for Varmint hunting are the lighter 90-100 Gr. Bullets.

1. Hornady:
a. 110 Gr. V-Max.

2. Sierra:
a. 90 Gr. HP.

3. Speer:
a. 90 Gr. TNT.
b. 100 Gr. HP.

PLINKING BULLETS:

1. Remington:
a. 100 Gr. SP.
b. 115 Gr. FMJ.

2. Speer:
a. 90 Gr. TNT Value Packs.

3. Silver State Armory
a. ? should be soon 115 FMJ ?





Reloading Recipes for 6.8 SPC:

Warning note: 1: always start at least 5% low and work up on all loads. Remember you need to know your barrel configuration. Using a hot load recipe for a Improved Chamber in a 10:1 SAAMI Chamber could have possible lethal effects on the shooter and bystanders. At the very least rifle damage would result.

The information below has been taken off of different forums on the internet and is for INFORMATIONAL PURPOSES ONLY. In no way should you rely on these recipes being safe in your rifle!! Please start low and go slow. Always check your reloading manuals.



It is organized in the following order: bullet, powder by burn rate fast to slow, charge size, barrel length.

6.8 SPC Hand Load Data Chart
**








Chart Still in progress Not Complete

Tim Welter


















TACKED AND BOLDED THE TITLE ~ COLD
Member
Avatar
Bronze
  • Joined Nov 2005
  • Posts 2527
  • Location USA USA
Offline
Bronze
  • Joined Nov 2005
  • Posts 2527
  • Location USA USA
Offline
Link Posted: 11/21/2007 9:52:31 PM EST
excellent info!
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 27
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 27
  • Location USA VA, USA
Offline
Link Posted: 11/21/2007 10:10:42 PM EST
Thanks

Paul,

Your info on velocity at different barrel lengths is now added.


Tim Welter
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 28
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 28
  • Location USA VA, USA
Offline
Link Posted: 11/21/2007 10:13:30 PM EST
best powders updated thanks Paul

Tim Welter
Basic
  • Joined Oct 2006
  • Posts 904
  • Location USA CO, USA
Offline
Basic
  • Joined Oct 2006
  • Posts 904
  • Location USA CO, USA
Offline
Link Posted: 11/21/2007 10:16:30 PM EST
[Last Edit: 11/24/2007 11:51:26 PM EST by constructor]
SWEEEEET
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 29
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 29
  • Location USA VA, USA
Offline
Link Posted: 11/21/2007 10:22:07 PM EST
If both of you will do that I will add the names on the ones that don't have the names. What I did was just grabbed these from the threads. Almost all of them were either posted by you Paul or Tim @Kot
Member
Avatar
Gold
  • Joined May 2002
  • Posts 534
  • Location USA AZ, USA
Offline
Gold
  • Joined May 2002
  • Posts 534
  • Location USA AZ, USA
Offline
Link Posted: 11/21/2007 10:32:05 PM EST
That is a lot of good information.

Thank you.
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 30
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 30
  • Location USA VA, USA
Offline
Link Posted: 11/21/2007 11:53:08 PM EST
[Last Edit: 11/21/2007 11:53:24 PM EST by Tim_W]
updated with other resource links and powder burn rate chart

Tim Welter
Basic
  • Joined Oct 2006
  • Posts 906
  • Location USA CO, USA
Offline
Basic
  • Joined Oct 2006
  • Posts 906
  • Location USA CO, USA
Offline
Link Posted: 11/22/2007 12:14:34 AM EST
[Last Edit: 12/15/2007 4:04:24 PM EST by constructor]
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 31
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 31
  • Location USA VA, USA
Offline
Link Posted: 11/22/2007 1:10:00 AM EST
That is what I always thought but everyone on all the ar-15 web site talks about how he builds the greatest barrels. The reason for my suspicion was when you go to PAC-NOR site and click on AR-16 barrel link it takes you to his site. Now as far as barrels go Pac-Nors are OK in the accuracy game. Now we aren't talking about what most here consider accuracy 1-0.5 moa. We are talking about benchrest kind 0.2-0.1 moa or less. Now AR's can't really use that kind of accuracy but the best (one's that win competitions) are Baritlien, Krieger, Hart, etc.. Pac-Nor's are in that same grouping just on the lower end of the list. Seems what John Noveske is really good at is profiling and cutting and designing a very strait and good chamber. That is a very big part to accuracy. His work is excellent.

I've gotten off track here sorry. I will change his positioning and get around to tagging you reloads. You are certainly up late. And yes I certainly do have time on my hands as of late this at least gives me something to do. the whole category thing is tough as some overlap most barrel makers also do chambering and profiling as well as some builders and manufacturers.

Tim Welter
Basic
  • Joined Mar 2007
  • Posts 239
  • Location USA USA
Offline
Basic
  • Joined Mar 2007
  • Posts 239
  • Location USA USA
Offline
Link Posted: 11/22/2007 1:31:41 AM EST
Outstanding. Vote for sticky.

One suggestion: under Barrels of Manufactures of Uppers & Rifles: twist / rifling / groove / chamber, the chamber offered by Ko-Tonics is listed as Improved SAAMI. But under Barrel Configurations & Useable Ammo: Twist / Chamber (SAAMI, Improved SAAMI, DMR), there's no Improved SAAMI, only Improved SAAMI #2.



Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 32
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 32
  • Location USA VA, USA
Offline
Link Posted: 11/22/2007 1:32:23 AM EST
Ok I have put a notation of the Pac-Nor blanks on there and updated your reloads with your name on the ones you marked.

I need to still add the specs for a SAAMI, Improved SAMMI, and DMR chambers. Reloading Equipment Suppressors lastly whatever else of real value I find while going through those 120 pages of the "6.8 FAQ & Loads" threads. Some of bullshit that when on in those threads was, well, let's just say, I wish I'd didn't feel the need to re-read them to gleen off any real info that showed up in there, other than the things from a few of the same people that always seem to be the ones with real and usable info. I think I have most of what was in those but I don't want to miss something useful.

Tim Welter
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 33
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 33
  • Location USA VA, USA
Offline
Link Posted: 11/22/2007 3:36:55 AM EST

Originally Posted By absael:
Outstanding. Vote for sticky.

One suggestion: under Barrels of Manufactures of Uppers & Rifles: twist / rifling / groove / chamber, the chamber offered by Ko-Tonics is listed as Improved SAAMI. But under Barrel Configurations & Useable Ammo: Twist / Chamber (SAAMI, Improved SAAMI, DMR), there's no Improved SAAMI, only Improved SAAMI #2.


I can now see hgow that could be confusing. It was actually a carry over when on another thread we were talking about the 3 different chamberings 1: SAAMI 2: improved SAAMI 3: DMR I will remove it as I only used it on the Improved. Thanks for catching that.

Tim Welter
Basic
  • Joined Sep 2007
  • Posts 16
  • Location USA FL, USA
Offline
Basic
  • Joined Sep 2007
  • Posts 16
  • Location USA FL, USA
Offline
Link Posted: 11/22/2007 4:11:26 AM EST
Good job! Many thanks.
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 34
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 34
  • Location USA VA, USA
Offline
Link Posted: 11/22/2007 4:41:45 AM EST
Constructor,

Your changes to DMR and brass have been update.

Also added magazines. Can someone give me the max inside length for each brand?

Thanks

Tim Welter
Member
Avatar
Bronze
  • Joined Sep 2005
  • Posts 2915
  • Location USA NJ, USA
Offline
Bronze
  • Joined Sep 2005
  • Posts 2915
  • Location USA NJ, USA
Offline
Link Posted: 11/22/2007 6:38:03 AM EST
Great job Tim. If you could, I would add the thread sizes that these barrels have. Most of them are the 5/8x24, but off of the top of my head, STAG and DPMS have the 1/2x28.
Visit www.68forums.com for all the info on the Remington 6.8SPC.
Team Member
Avatar
Bronze
  • Joined Oct 2002
  • Posts 1147
  • Location USA WI, USA
Online
Bronze
  • Joined Oct 2002
  • Posts 1147
  • Location USA WI, USA
Online
Link Posted: 11/22/2007 9:07:50 AM EST

Originally Posted By paulosantos:
Great job Tim. If you could, I would add the thread sizes that these barrels have. Most of them are the 5/8x24, but off of the top of my head, STAG and DPMS have the 1/2x28.


The Stag I had was 1/2x36, same as the Colt 9mm barrels.
Basic
  • Joined Oct 2006
  • Posts 908
  • Location USA CO, USA
Offline
Basic
  • Joined Oct 2006
  • Posts 908
  • Location USA CO, USA
Offline
Link Posted: 11/22/2007 9:38:18 AM EST
[Last Edit: 12/15/2007 4:05:03 PM EST by constructor]
Member
Avatar
Bronze
  • Joined Sep 2005
  • Posts 2916
  • Location USA NJ, USA
Offline
Bronze
  • Joined Sep 2005
  • Posts 2916
  • Location USA NJ, USA
Offline
Link Posted: 11/22/2007 10:42:51 AM EST

Originally Posted By vmpglenn:

Originally Posted By paulosantos:
Great job Tim. If you could, I would add the thread sizes that these barrels have. Most of them are the 5/8x24, but off of the top of my head, STAG and DPMS have the 1/2x28.


The Stag I had was 1/2x36, same as the Colt 9mm barrels.


Sorry about that. Stag is 1/2x36. DPMS is 1/2x28.
Visit www.68forums.com for all the info on the Remington 6.8SPC.
AR Variants Mod and Juris Doctor (in training)!
Avatar
Moderator
  • Joined Oct 2003
  • Posts 4954
  • Location USA USA
Offline
Moderator
  • Joined Oct 2003
  • Posts 4954
  • Location USA USA
Offline
Link Posted: 11/22/2007 11:19:39 AM EST
Big Bores for Big Boars!

<font color=blue><font size=3>
www.458SOCOMforums.com

www.68Forums.com
</font id=s3></font id=blue>

Quis custodiet ipsos custodes
pro-gun-fessional
Avatar
Bronze
  • Joined Jan 2007
  • Posts 948
  • Location USA TX, USA
Offline
Bronze
  • Joined Jan 2007
  • Posts 948
  • Location USA TX, USA
Offline
Link Posted: 11/22/2007 11:56:58 AM EST
Tim,


Please excuse me if someone has already suggested this, but I did not see in the secifications for each barrel manufacturer, etc. whether their product included M4 feedramps. We all know that the M4 ramps are actually made up of cuts in both the barrel extension and the receiver, though. For example, if you buy a complete upper from Ko-Tonics, Tim builds the ramps into all them. However, if you buy a barrel from Ko-Tonics, the extension has the ramps cut, and the builder will then still need to machine the cuts into the receiver. Some noobs might not know that. Randall showed some pics a while back detailing the proper configuration in which the extension ramp cuts had to line up with the receiver cuts to properly allow for feeding.

This seems to be a little more important with the 6.8 SPC than with 5.56, (especially given the propensity for the C-products mags occasionlly to require a little feed lip tweaking) and since this appears to be the new comprehensive buyer's/user's guide, that might also be useful to first-time 6.8 buyers.
"Texas - the only state that ever kicked another country's ass."


"I'll never forget September 11, 2001, those who have fought and died, or those who continue to fight to avenge the deaths of over 3000 innocent Americans"
AR Variants Mod and Juris Doctor (in training)!
Avatar
Moderator
  • Joined Oct 2003
  • Posts 4956
  • Location USA USA
Offline
Moderator
  • Joined Oct 2003
  • Posts 4956
  • Location USA USA
Offline
Link Posted: 11/22/2007 12:14:17 PM EST
Big Bores for Big Boars!

<font color=blue><font size=3>
www.458SOCOMforums.com

www.68Forums.com
</font id=s3></font id=blue>

Quis custodiet ipsos custodes
Basic
  • Joined Sep 2004
  • Posts 175
  • Location USA MO, USA
Offline
Basic
  • Joined Sep 2004
  • Posts 175
  • Location USA MO, USA
Offline
Link Posted: 11/22/2007 1:46:46 PM EST
Run with it
Basic
  • Joined Oct 2005
  • Posts 226
  • Location USA MI, USA
Offline
Basic
  • Joined Oct 2005
  • Posts 226
  • Location USA MI, USA
Offline
Link Posted: 11/22/2007 2:16:13 PM EST
condensed info is a good thing
Member
Avatar
Bronze
  • Joined Sep 2005
  • Posts 2917
  • Location USA NJ, USA
Offline
Bronze
  • Joined Sep 2005
  • Posts 2917
  • Location USA NJ, USA
Offline
Link Posted: 11/22/2007 5:42:56 PM EST

Originally Posted By hi-tech-rancher:
Tim,


Please excuse me if someone has already suggested this, but I did not see in the secifications for each barrel manufacturer, etc. whether their product included M4 feedramps. We all know that the M4 ramps are actually made up of cuts in both the barrel extension and the receiver, though. For example, if you buy a complete upper from Ko-Tonics, Tim builds the ramps into all them. However, if you buy a barrel from Ko-Tonics, the extension has the ramps cut, and the builder will then still need to machine the cuts into the receiver. Some noobs might not know that. Randall showed some pics a while back detailing the proper configuration in which the extension ramp cuts had to line up with the receiver cuts to properly allow for feeding.

This seems to be a little more important with the 6.8 SPC than with 5.56, (especially given the propensity for the C-products mags occasionlly to require a little feed lip tweaking) and since this appears to be the new comprehensive buyer's/user's guide, that might also be useful to first-time 6.8 buyers.


This is a good idea about the feed ramps. When I started calling up the companies I asked and DPMS has the M4 feedramps. STAG doesn't and Bushmaster has what they call M2 feedramps.
Visit www.68forums.com for all the info on the Remington 6.8SPC.
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 35
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 35
  • Location USA VA, USA
Offline
Link Posted: 11/22/2007 7:25:46 PM EST
[Last Edit: 11/22/2007 7:26:58 PM EST by Tim_W]
Wow, a lot of great things to add in I hadn't though of. I will add the listed things in over the night. I wasn't on today as one, I'm usually a night bird and I was away for Thanksgiving today. I hope everyone had a great Thanksgiving and now has their now fatter rear-ends on the lazy boy enjoying the rest of the day.

I also would much prefer this format for info as opposed to searching through 100+ pages of info 3/4 of which most can't get to, even if I think you should pay and support this site. I can tell you I was ready to jump off a bridge, out of frustration, last night as I started to get the important info out of the other threads. I can't see most people being willing to read all of that to get what amounts to a few pages of info out of it. I don't mind doing it but I am not right in the head so thats not a good indication for others..

Also, I have no problem if this does get stickied with the Mods ie Cold etc adding things as they come up if they feel the need. I would just ask that if it's updated, add a post stating what has changed or been added so we can keep track.

The only thing I can take credit for is find and consolidating the info and even that I had help from Paul and Constructor so. All this info was somewhere on this site or linked to from here in some fashion. I just wanted to help make it accessible. Hell, it wasn't even my idea it was paulosantos idea. I just volunteered and took it and ran. The only things new is knowing what dealer are suppling what but again it can probably still be found on this site somewhere it would just take a lot of searching and reading to find.

Well I'm going to finish up with my family and get to work on the updates. I'm on the site almost every night and accept PM's. So I'm reachable.


Happy Thanksgivings,

Tim Welter
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 39
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 39
  • Location USA VA, USA
Offline
Link Posted: 11/23/2007 8:12:52 AM EST
[Last Edit: 11/23/2007 8:29:12 AM EST by Tim_W]
Ok guys, I have updated all the info you provided along with the suggestions you gave.

I added:

M4 cut or not.
Thread pitch.
Magazine OAL Dimension for ammo and rating based on feed back on here and every other site.
Addition of 2 other 6.8 forums

I still haven't gotten through all the Old 6.8 SPC 1, 2 ,and 3 threads so there is probably more to come ie: reload equipment, suppressors, bdc scopes etc...


Hope everyone's Thanksgiving was relaxing and enjoyable,

Tim Welter
pro-gun-fessional
Avatar
Bronze
  • Joined Jan 2007
  • Posts 950
  • Location USA TX, USA
Offline
Bronze
  • Joined Jan 2007
  • Posts 950
  • Location USA TX, USA
Offline
Link Posted: 11/23/2007 10:20:47 AM EST
[Last Edit: 11/23/2007 10:42:10 AM EST by hi-tech-rancher]

Originally Posted By Tim_W:
Ok guys, I have updated all the info you provided along with the suggestions you gave.

I added:

M4 cut or not.
Thread pitch.
Magazine OAL Dimension for ammo and rating based on feed back on here and every other site.
Addition of 2 other 6.8 forums

I still haven't gotten through all the Old 6.8 SPC 1, 2 ,and 3 threads so there is probably more to come ie: reload equipment, suppressors, bdc scopes etc...


Hope everyone's Thanksgiving was relaxing and enjoyable,

Tim Welter


Thanks, Tim same to you. I'm still recovering from the food orgy

BTW, I have some more info for you:

1) on any 5/8 X 24 threaded barrel, you can use .308 screw on cans made by Jet, SWR, Shark, SRT, AAC, Gemtech and Ops Inc. Surefire can be mounted to similar threads, but you must purchase the adapter for their proprietary fast atach mount. From my own personal experience, and from that of others on the board, the .308 cans work really well on the 6.8 SPC guns. I may have left others out, and apologize if I did. I hope some of the "suppressor guys" will finish this list off for you. I think there are some companies which will make 6.8 bored cans like Jet, Shark and maybe one other whose name escapes me right now. I am not very familiar with the other QD models, so I can't give any input there, other than to say that most of them attach to a flash hider, compensator, etc., and installation should be simple.

2) we have not mentioned whether barrels are "target crowned" or posess standard crowns. Another factor which IMO is likely to affect accuracy.


ETA: I have a thread in "suppressors" and am already getting a list built for you from the various dealers and users. Should be pretty complete in a few days. Hope this saves you a little time

- OPS INC 3rd, 12th, 14th, 15th, 16th models.

More to come as the thread builds. Here's the link in case you want to refer to it:

http://www.ar15.com/forums/topic.html?b=6&f=20&t=231789

"Texas - the only state that ever kicked another country's ass."


"I'll never forget September 11, 2001, those who have fought and died, or those who continue to fight to avenge the deaths of over 3000 innocent Americans"
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 40
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 40
  • Location USA VA, USA
Offline
Link Posted: 11/23/2007 3:01:44 PM EST
Thanks I just go back from being dragged to black Friday morning shopping by the Mrs. and my 3 daughters. Man I hate crowds. What would ever posses someone to camp out for 36 hours in front of a store just to save 100-200 dollars on a very low end laptop. Or getting up at 4AM just to go into very crowded stores with other grumpy people to get sales that will be the same in 3 weeks for Christmas. Just don't get it.


I will add the Suppressor data tonight. Maybe you will have the list complete by then and I can add that.


Tim Welter
Uncle Fester
Avatar
Bronze
  • Joined Dec 2002
  • Posts 989
  • Location USA IA, USA
Offline
Bronze
  • Joined Dec 2002
  • Posts 989
  • Location USA IA, USA
Offline
Link Posted: 11/23/2007 6:30:23 PM EST
Has the industry settled on a standardized primer? I know originally Remington used a large rifle primer and others a small rifle primer. Is there still a division among manufaturers? Or did they settle on the small primer?

This is one of the things that has kept me from jumping on this cartridge. It seems it still has some growing to do.
Guns? Guns? I don't have any guns. Now Uncle Fester down the road, he has some guns, and occasionally he lets me shoot them.
Member
Avatar
Bronze
  • Joined Sep 2005
  • Posts 2921
  • Location USA NJ, USA
Offline
Bronze
  • Joined Sep 2005
  • Posts 2921
  • Location USA NJ, USA
Offline
Link Posted: 11/23/2007 7:11:55 PM EST
This is just an idea, but does anyone know how to make charts? Maybe in excell or a similar program. You could have all of the manufacturers on top and then have on the left side categories such as:
Twist, thread size, Ramps, Chamber, chrome lined or not, etc.
Visit www.68forums.com for all the info on the Remington 6.8SPC.
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 42
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 42
  • Location USA VA, USA
Offline
Link Posted: 11/23/2007 7:47:48 PM EST
I was thinking of doing that as this has now morphed into a lot of info. Let me see what I can do. I'm fairly good in excel.

Tim Welter
Member
Avatar
Bronze
  • Joined Sep 2004
  • Posts 802
  • Location USA WY, USA
Offline
Bronze
  • Joined Sep 2004
  • Posts 802
  • Location USA WY, USA
Offline
Link Posted: 11/24/2007 10:28:37 AM EST

Originally Posted By Rcd567:
Has the industry settled on a standardized primer? I know originally Remington used a large rifle primer and others a small rifle primer. Is there still a division among manufaturers? Or did they settle on the small primer?

This is one of the things that has kept me from jumping on this cartridge. It seems it still has some growing to do.


I don't understand why a primer size would prevent you from getting into the 6.8 SPC. Brass is available in both choices and I can not believe you do not shoot rifles with both size primers and therefore stock both in your reloading components. If you only stock one - then buy brass for that size primer. I am buying both SSA and REM brass and experimenting to make my own determination of which to use. So far they seem to perform equally and powder selection is more of an issue than primer / brass mfg.
Member
Avatar
Bronze
  • Joined Oct 2004
  • Posts 649
  • Location USA SC, USA
Offline
Bronze
  • Joined Oct 2004
  • Posts 649
  • Location USA SC, USA
Offline
Link Posted: 11/24/2007 12:42:04 PM EST
Awesome resource! Thank you very much for taking the time to put it together.

One small note is that LWRC now stands for Land Warfare Resources Corp. and they prefer to no longer have anything to do with Leitner-Wise (the man or the name).

Thanks,
Stephen
ATS Tactical Gear LLC
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 43
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 43
  • Location USA VA, USA
Offline
Link Posted: 11/24/2007 3:52:08 PM EST

Originally Posted By stephen_101st:
Awesome resource! Thank you very much for taking the time to put it together.

One small note is that LWRC now stands for Land Warfare Resources Corp. and they prefer to no longer have anything to do with Leitner-Wise (the man or the name).

Thanks,
Stephen


That's what happens when you are cutting and pasting @ 4:30 AM I really did know that. I'll make the changes tonight.

I have started on working this info into a spread sheet format to see how that looks. I'll put it up when I get it looking good. Until then I will keep updating this page as info/changes comes in.



Tim Welter
Basic
  • Joined May 2001
  • Posts 1629
  • Location USA USA
Offline
Basic
  • Joined May 2001
  • Posts 1629
  • Location USA USA
Offline
Link Posted: 11/24/2007 6:12:53 PM EST
Just as an correction; my original Douglas barrels ('04 time frane) are 1:11.
Basic
  • Joined Oct 2006
  • Posts 101
  • Location USA FL, USA
Offline
Basic
  • Joined Oct 2006
  • Posts 101
  • Location USA FL, USA
Offline
Link Posted: 11/24/2007 6:30:16 PM EST
Why are Model 1 Barrels not recomended aren't they made by Shaw?
Basic
  • Joined Oct 2006
  • Posts 102
  • Location USA FL, USA
Offline
Basic
  • Joined Oct 2006
  • Posts 102
  • Location USA FL, USA
Offline
Link Posted: 11/24/2007 6:35:06 PM EST
Why are Model 1 Barrels not recomended aren't they made by Shaw?
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 45
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 45
  • Location USA VA, USA
Offline
Link Posted: 11/24/2007 9:13:44 PM EST

Originally Posted By mamasboy:
Why are Model 1 Barrels not recomended aren't they made by Shaw?



The reason I put that denotation is the twist rate @ 9.5:1 is way to fast for the bullets used in the 6.8 and will cause increased pressure especially if you want to stetup the reloads hot. On top of that they also use a SAAMI chamber which doesn't help and compounds the problem. As far a E.R Shaw making them this is true but they make barrels based on what the customer wants and specs to them. They also make LWRC SAAMI-10:1 6 groove and their new Improved 10:1. Also Ko-tonics 11:1 Improved 4 groove. I think Model 1 got that twist from thinking that the 6.8 was just another .270 as that twist would work in a .270 but even that is a fast twist for that cartridge. This is of course just speculation. We now know you can drop the twist down to 12:1 and still fully stabilize everything currently being offered in loaded ammo. The other problem with to fast a twist is it can "over"stabilize bullets which will hurt accuracy in most cases.

But with all that said, it will work with all the loaded ammo openly available. In all honestly though, its barrels with this spec that cause ammo manufactures like Art to have to keep there loads so low for safety. They have to load to the lowest common denominator out there which is at present SAAMI chamber 9.5 twist spec'd. Other than that, is a perfectly fine barrel. It isn't defective. Unless, you were unfortunate enough to get one of the early defective barrels that had the bad chroming. Which caused tight chambers and bores.

Hope this explains the comment.


Tim Welter
Basic
  • Joined Oct 2006
  • Posts 912
  • Location USA CO, USA
Offline
Basic
  • Joined Oct 2006
  • Posts 912
  • Location USA CO, USA
Offline
Link Posted: 11/24/2007 10:48:33 PM EST
[Last Edit: 12/15/2007 4:05:56 PM EST by constructor]
Team Member
Avatar
Bronze
  • Joined Oct 2002
  • Posts 3321
  • Location USA PA, USA
Offline
Bronze
  • Joined Oct 2002
  • Posts 3321
  • Location USA PA, USA
Offline
Link Posted: 11/25/2007 7:59:09 AM EST
I don't even have a 6.8 yet (budget woes), but THANKS for putting this info together in one place for us to peruse.

Member
Avatar
Bronze
  • Joined Dec 2005
  • Posts 1157
  • Location USA FL, USA
Offline
Bronze
  • Joined Dec 2005
  • Posts 1157
  • Location USA FL, USA
Offline
Link Posted: 11/25/2007 7:19:49 PM EST
[Last Edit: 11/25/2007 7:36:03 PM EST by MyakkaVice]
Great info and links all in one spot. Thank you! BTW I was just on the DPMS web site and noticed they offer 16" barrels in 1x10 twist, but their 20" barrels are 1x11 twist, any idea why they do this? Thanks again!

DPMS 1x11 twist uppers

Myakka City, Florida.
AR Variants Mod and Juris Doctor (in training)!
Avatar
Moderator
  • Joined Oct 2003
  • Posts 4972
  • Location USA USA
Offline
Moderator
  • Joined Oct 2003
  • Posts 4972
  • Location USA USA
Offline
Link Posted: 11/25/2007 7:47:11 PM EST
[Last Edit: 11/25/2007 7:47:45 PM EST by Cold]
Big Bores for Big Boars!

<font color=blue><font size=3>
www.458SOCOMforums.com

www.68Forums.com
</font id=s3></font id=blue>

Quis custodiet ipsos custodes
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 51
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 51
  • Location USA VA, USA
Offline
Link Posted: 11/25/2007 11:20:58 PM EST
Cold,
Thanks for tacking this. I will give DPMS a call tomorrow to find out the particulars on the barrel specs for the 16 & 20. I think they may still not be sure for themselves that 11:1 isn't to slow. But they can risk it in longer barrels. The longer the barrel the higher the velocity the slower the twist can be. But I'll try to find out for sure tomorrow.

Tim Welter
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 52
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 52
  • Location USA VA, USA
Offline
Link Posted: 11/25/2007 11:56:02 PM EST
I have add a suppressor section after the mag section, It has a small writeup. I will be adding the tech info over the next day.

I have been working on the Excel spreed sheet version of this. It should work out well. The only thing is, as this is still being revised and many things added, I won't be able to put something up until we have the categories all finished. We can then place everything in the proper order on the sheet. Trying to do this after it is up would get confusing if we end up having to reformat it, moving data around. People will end up getting confused and frustrated when things aren't where they were the day before. So, once most things are added and we generally agree its solid. I will workup a spreadsheet format for it. I will then post it and let everyone review it and make suggestions.

Thanks to everyone thats helping get info and making suggestion or just proofing everything ie broken links etc... I will do my best to get things up / changes quickly.

Thanks

Tim Welter
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 53
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 53
  • Location USA VA, USA
Offline
Link Posted: 11/26/2007 12:02:55 AM EST
LWRC name change to reflect the current Company name Land Warfare Resources Corp..

Sorry it took so long. I had actually forgotten to do it. While re-reading the thread I saw the request and remembered I hadn't done it.


Tim Welter
Canon Cocker 105 and 155mm quailified
Avatar
Bronze
  • Joined Mar 2005
  • Posts 1576
  • Location USA IN, USA
Offline
Bronze
  • Joined Mar 2005
  • Posts 1576
  • Location USA IN, USA
Offline
Link Posted: 11/26/2007 5:48:54 PM EST
tag
Another load from the floor of the 10th U.S. Cavalry stables
NRA life member and proud of it!
a KNOW code Amateur Extra!
.-- --- ----- .--.
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 55
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 55
  • Location USA VA, USA
Offline
Link Posted: 11/27/2007 6:30:48 PM EST
Well I called DPMS a few times in regard to there different twist barrels and couldn't get anyone in the tech dept. I will try again tomorrow. I'd shoot them an email but don't think I'll get as complete answer that way


Tim Welter
Member
Avatar
Bronze
  • Joined Sep 2005
  • Posts 2931
  • Location USA NJ, USA
Offline
Bronze
  • Joined Sep 2005
  • Posts 2931
  • Location USA NJ, USA
Offline
Link Posted: 11/27/2007 6:56:30 PM EST

Originally Posted By Tim_W:
Well I called DPMS a few times in regard to there different twist barrels and couldn't get anyone in the tech dept. I will try again tomorrow. I'd shoot them an email but don't think I'll get as complete answer that way


Tim Welter


When I called, I was told that all of their barrels were 1:10" twist with SAAMI chamber. I even pointed out that they are advertising the 20" barrel as a 1:11" tist but he still said it was 1:10" twist.
Visit www.68forums.com for all the info on the Remington 6.8SPC.
Member
Avatar
Bronze
  • Joined Aug 2007
  • Posts 57
  • Location USA VA, USA
Offline
Bronze
  • Joined Aug 2007
  • Posts 57
  • Location USA VA, USA
Offline
Link Posted: 11/27/2007 7:12:01 PM EST
I figured it was a misprint. Funny how there misprint is actually what they should be. Maybe the persons subconscious was talking there. I would still like to get a hold of someone there high enough up to be able to answer whether they are even considering switching over to 11:1 or #2 chamber or both especially as Shaw is now going to the #2 chamber.

Tim Welter
Member
Avatar
Bronze
  • Joined Dec 2005
  • Posts 1161
  • Location USA FL, USA
Offline
Bronze
  • Joined Dec 2005
  • Posts 1161
  • Location USA FL, USA
Offline
Link Posted: 11/27/2007 7:24:04 PM EST
[Last Edit: 11/27/2007 7:28:27 PM EST by MyakkaVice]
I wonder what's going on. I just went to the AR15.com industry section and the DPMS area there and clicked on the "DPMS official myth busting" thread that's tacked at the top. There they again state that the 6.8SPC 16" barrels are 1x10 twist and an "M4" profile and the 20" barrels are 1x11 twist and an "HBAR" profile. Next time someone calls DPMS they should get the name of the person that tells them the 20" barrels are not 1x11 twist as advertised.

Myakka City, Florida.
Arrow Left Previous Page
Page / 3
6.8SPC FAQ (Page 1 of 3)
Top