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 Chrono results for SSA 140, 120 SST, 110 HPBT, 110 ProHunter, 115 HPBT, a few reloads
CavReconScout  [Member]
8/15/2012 1:38:07 PM
Went to the range today and was able to chrono some loads. Environmental conditions were: 804' Elevation, 81 degrees, 43% humidity, 29.91 pressure

Rifle was an 18" Kotonics chrome lined stainless barrel. Chrono was a Pro Chrono Digital. All strings were 10 shot, except the TNT reloads, which were 15.

Factory loads:
SSA 115 HPBT.
2622 Avg
62 ES.
17 SD.

SSA 140 VLD
2470 Avg
51 ES
15 SD

Hornady 110 HPBT
2629 Avg
41 ES
11 SD

Hornady 120SST
2544 Avg
39 ES
14 SD

SSA 110 ProHunter
2610 Avg
97 ES
31 SD

Reloads:
Speer 90TNT, 29.5 Reloader7, CCI LRP
2879 Avg
49 ES
14 SD

Hornady 110 HPBT, 27gr 10X, CCI LRP
2557 Avg
48 ES
14 SD

Hornady 110 HPBT, 27gr 10X, CCI SRP
2591 Avg
50 ES
15 SD

If the weather cooperates I am going to try to shoot at distance Sunday. I want to try those 140 VLD at 1000 yds. I have shot my Hornady 110 HPBT reloads out to 800yds, and they do pretty good. It will be interesting to see how they fly going subsonic.
wyv3rn  [Member]
8/15/2012 7:08:30 PM
Thank you for sharing your detailed chrono session data. Any insights/observations on the accuracy of the 140gr VLD's in your particular rifle?
CavReconScout  [Member]
8/15/2012 9:16:13 PM
The Hornady 120SST, Hornady 110HPBT, SSA 115HPBT, and SSA ProHunter all shoot great in my rifle. The SSA 140VLD groups seem to run a little larger than those, but I have not shot any at distance yet. Plus I was not shooting for groups, just comparing them and getting the chrono numbers. I was shooting prone, off a bipod, and was getting tired towards the end of the string. Now, having all the excuses out of the way, here is the 10 shot group (sorry not very good cell phone photos):




Here is a comparison photo of the 15 shot group of the 90TNT reloads:



I don't have enough of the 140VLD downrange to make any predictions, but I like them. Not quite as accurate for me as the Hornady 120SST, but it fills a niche the others don't. And here is a photo of the rifle:



Twisted10  [Member]
8/15/2012 10:14:02 PM
Nice.

Im a big fan of the 120's.

I just free floated my barrel and am heading to the range soon. Im debating an ARP lightweight barrel next...
CavReconScout  [Member]
8/16/2012 1:09:29 PM
Originally Posted By Twisted10:
Nice.

Im a big fan of the 120's.

I just free floated my barrel and am heading to the range soon. Im debating an ARP lightweight barrel next...


Thanks. Both my 6.8 are free floated, and they seem to be more consistent now, especially when they get hot. Depending on what length ARP barrel you get it might shoot a little faster than mine. I've been told the chrome lining runs a little slower, but can't offer any proof one way or the other. My buddy has a Noveske 16", if he shoots with us Sunday maybe we can chrono the same load and see.
LRRPF52  [Team Member]
8/16/2012 3:46:53 PM
Here's the trajectory data on the 120gr SST load with a 200yd zero, 2.7" optic height, 10mph crosswind:

.......Range    Velocity    Energy     Trajectory         TOF          Drift

(yards) (fps) (ft-lb) (MILS) (sec) (MILS)
0 2544 1724 0.00 0.0000 0.00
50 2434 1578 0.18 0.0603 -0.13
100 2326 1442 0.52 0.1233 -0.26
150 2222 1315 0.34 0.1893 -0.41
200 2120 1197 0.00 0.2584 -0.55
250 2021 1088 -0.42 0.3309 -0.71
300 1924 986 -0.89 0.4069 -0.87
350 1831 893 -1.42 0.4869 -1.04
400 1740 807 -1.99 0.5709 -1.21
450 1654 729 -2.62 0.6593 -1.40
500 1570 657 -3.29 0.7524 -1.59
550 1491 592 -4.02 0.8504 -1.80
600 1416 535 -4.81 0.9537 -2.01
pavlovwolf  [Team Member]
8/16/2012 5:04:39 PM
FWIW OP, my 90TNT load with once fired SSA brass, 29.5gr of Re 7, from a 16" ARP Recon barrel is 2900fps. Most of the ARP barrels are fast for length.

My original load for that was 29.8gr at 2925fps.

In the last outing I actually tested it with a scope for groups a couple of years ago, I got 4 of 5 groups under .500. Best was .422. Worst group was .650, with a called flyer. All groups were 5 shots. I really am impressed with the little pills. It looks like yours likes it too.

It is the most accurate load I have so far, still. It was one of the first loads I worked up for it. I have shot these out to 750 yards. I shot that distance for fun, but did go to 500 for groups.

It held .5 moa out to 300 yards, and was still 1 moa at 500 on a couple of strings. Past that and the wind really messed with it. It was really still that day, and I do think that even a 10mph wind would have really messed with them past 400 yards. I would be better with the 110s at that range. Still, switching to the Eotech, it was easy to keep 5 out of 5 on the head of a B21 target at 300 yards.


I am at 2650fps with 110gr Nosler AB, and at 2675fps with 110gr Hornady OTM with 28.5gr of AA2200. I found the AA2200 to be more accurate, but not as high of velocity as the H 322. With the H322 I am at 2700fps.

The 110 Hornady was a sub moa round with the H322, but most groups were in the .700 range. I was more than happy, but when I tested the AA2200, they went sub .500.

I haven't been able to do the 120s or the 140s yet. I have shot very, very little this last year.

Your groups look really good. Keep having fun.
LRRPF52  [Team Member]
8/17/2012 7:54:59 AM
Here's the table for the 140gr Berger, assuming their published BC of .487 G1, with a 200yd zero, at 2470fps:

.......Range    Velocity    Energy     Trajectory         TOF          Drift

(yards) (fps) (ft-lb) (MILS) (sec) (MILS)
0 2470 1896 0.00 0.0000 0.00
50 2381 1762 0.22 0.0618 -0.11
100 2294 1635 0.54 0.1260 -0.23
150 2208 1516 0.35 0.1927 -0.34
200 2124 1403 -0.00 0.2619 -0.47
250 2043 1297 -0.42 0.3339 -0.59
300 1963 1197 -0.90 0.4088 -0.73
350 1885 1104 -1.41 0.4868 -0.86
400 1809 1017 -1.97 0.5681 -1.01
450 1735 936 -2.57 0.6527 -1.16
500 1664 860 -3.21 0.7410 -1.31
550 1595 791 -3.89 0.8331 -1.47
600 1528 726 -4.62 0.9292 -1.64
650 1465 667 -5.39 1.0294 -1.81
700 1405 613 -6.21 1.1340 -1.98
750 1348 564 -7.09 1.2431 -2.17
800 1294 521 -8.02 1.3567 -2.36
850 1245 482 -9.02 1.4749 -2.55
900 1199 447 -10.07 1.5978 -2.74
950 1158 417 -11.20 1.7251 -2.94
1000 1121 391 -12.39 1.8569 -3.14


If I owned a 6.8 and was trying to get a heavier pill to work, I would also try the 130gr .277 Hunting VLD, with a .452 G1 BC, that also allows more powder volume in the case. Push that to 2550fps, and you still have a good 400yd combo. I know these pills are meant for the .270 Win., so I wonder how much the given BC velocites are affected when jumping down from 3100fps or 2850fps, to 2400-2500fps.

It would be great to see the actual drop data for that 140gr load, which looks like it could be a good target bullet for smacking steel with the 6.8 further than what the varmint-weight bullets can deal with.
DaveS  [Team Member]
8/17/2012 11:51:51 AM
Please tell me moar about this C-L'd Stainless Steel barrel.




BTW, thanks for work.
CavReconScout  [Member]
8/17/2012 1:37:58 PM
Thanks for the charts, they look really close to what I get using iSnipe and Shooter. Sunday will be the first time I have shot any heavy bullets at distance, if they do really well I guess I will have to load some up and do a ladder test. I'm not sure about the BC, when I start streching it out I will log the corrections and see if they differ from the charts.

I've never used any AA2200, but may have to buy some. My barrel really does like the 90 TNT, this is a load with that bullet and 29.5gr of Reloader 10X, 2.30 OAL, 2831 fps Avg, 5 shot group:



I know what you mean about the wind, I suck at reading it, here is an 800yd group (10 shot, with 2 misses) using the 110 HPBT reload, 10-15 mph wind crossing left to right:



Just to compare, this is a 600yd group with little wind (suppose to be a 5 shot group, but I got a little excited and lost count):



And a 10 shot 300yd group,10mph wind left to right, checking my zero:



Please keep in mind that I am not a benchrest shooter, all these were shot prone off a bipod, and I am only showing the better groups

As far as the barrel, it is one of Tim Hick's, originally Kotonics, then Cardinal Armory (He is unfortunately out of business). I didn't buy any while he was open, and always regretted it. This barrel was offered for sale on Lightfighter, as barely used at a great price. I picked it up, and it shoots great. It is 4 groove, lightweight profile, 1/11, midlength gas, chrome lined, and bead blasted matte. It really shoots, and makes me look like a better shot than I really am.
W88  [Member]
8/17/2012 1:41:27 PM
Some of those numbers look funny. SSA's website doesn't list any 140 gr loads and their max velocity for a 115gr load is 2575fps, so 2470 with a 140 gr sounds highly unlikely. Don
pavlovwolf  [Team Member]
8/17/2012 2:02:56 PM
http://www.ssarmory.com/6.8_spc_ammo_140gr_VLD_Berger.aspx
pavlovwolf  [Team Member]
8/17/2012 2:11:03 PM
Originally Posted By W88:
Some of those numbers look funny. SSA's website doesn't list any 140 gr loads and their max velocity for a 115gr load is 2575fps, so 2470 with a 140 gr sounds highly unlikely. Don


Don, look at my previous post.

All info obtained from 16" SS, and CL barrels.

An AR Performance barrel will see increases of about 25-50fps per inch. One of the guys at the 68forum got 2475fps from his 16" barrel. The melonite/poly groove/6.8x43 ARP chamber gives you a bit more that most SS or CL barrels. With most loads the 16" Recons will shoot about the same velocity as a 20" SS or CL barrel. I have seen that repeated over and over.

The 18" barrels that are SS or chrome lined will see 2450fps, and the 20s will see 2500fps.

LRRP. I was looking earlier for it, but I am pretty sure one of the guys did a drop test on them, and has the actual BC.
Don't quote me on this, but if memory serves me, the BC is what SSA has listed on their site. Most all new ammo/projectiles get hammered out and tested, real world BC etc , over there. There were quite a few threads, and finding it has been tough. Maybe Chris/ HTR will chime in with it.
CavReconScout  [Member]
8/17/2012 2:15:21 PM
Originally Posted By W88:
Some of those numbers look funny. SSA's website doesn't list any 140 gr loads and their max velocity for a 115gr load is 2575fps, so 2470 with a 140 gr sounds highly unlikely. Don


SSA has all the test data on their site. They are listing the 140VLD @ 2400 out of a 16" barrel, I am getting 2470 out of an 18". I will chrono it again on Sunday before we shoot at distance, to set up iSnipe and Shooter, and to confirm my zero. I don't expect to see any huge variation though.

Edit: Hah, pavlovwolf beat me to it!
wyv3rn  [Member]
8/17/2012 2:19:48 PM
Originally Posted By W88:
Some of those numbers look funny. SSA's website doesn't list any 140 gr loads and their max velocity for a 115gr load is 2575fps, so 2470 with a 140 gr sounds highly unlikely. Don


SSA lists the 6.8SPC 140gr as 2400fps from a 16" barrel. Yes, SSA loaded long (2.3" iirc) and did some powder magic to get there. But others with 16" barrels have verified it, also reporting chrono data right around 2400fps from a 16" barrel. So 2470 from an 18" in slightly warm conditions is not unlikely.

As for 115gr@2575fps from a 16", yes this is pretty standard. Wilson Combat is loading 110gr BTHP @ 2700fps from a 16" too. There might even be a little room to move past 2600fps in the 115gr from a 16".

My PSA 14.7" also runs a bit fast for its length, usually attaining fps around factory spec for 16". At first I was worried maybe it had a tight chamber, but expended casings look and measure just fine. Primers a bit flat maybe, but in-line with others' results/pics I've seen for the same loads. Nothing abnormal and no cratering, etc. I'm getting ~2585fps from factory 110gr V-Max and ~2465fps from factory 120gr SST. Here's some raw data from chrono session (of course Remington 6.8SPC is the weakest/slowest-loaded of all factory loads so don't count them with regards to what fps 6.8SPC is capable of):

Upper: PSA CHF chrome-lined mid-length 14.7" 6.8SPC-II 4-groove 1/11 twist (with FH welded to legal 16.1" length).
Conditions: 1100ft Alt, 93F, 16% Hum, 29.73Hg. Chronograph 7-8ft from muzzle.

Factory Remington 6.8SPC 115gr MC (FMJ), Part# L68R2, Lot# N14 VD1, 10-shots.
Average: 2363fps
ES: 92fps

Factory Remington 6.8SPC 115gr MC (FMJ), Part# L68R2, Lot# L28 TC1, 5-shots.
Average: 2383fps
ES: 72fps

Accuracy was within expectations for this load using iron sights.

========

Factory Hornady 6.8SPC 110gr VMAX w/ cannelure, Part#8346, Lot#3120734, 15-shots.
Average: 2587fps
ES: 70fps

I was surprised at the achieved velocity of the factory load. Primers very flattened. Accuracy was within expectations using iron sights.

========

Factory Hornady 6.8SPC 120gr SST, Part#8347, Lot#3112767, 10-shots.
Average: 2467fps
ES: 32fps

I was surprised at the achieved velocity of the factory load as well. Primers very flattened. Accuracy was within expectations using iron sights.

ETA: hehe, you both beat me to the response.
W88  [Member]
8/17/2012 4:11:26 PM
Looked at SSA's website again. The 140gr VLD wasn't in the regular ballistic tables but in a popup window.
Operator42  [Member]
8/17/2012 8:33:10 PM
Factory SSA 140 Berger, 5800 ft, 85 deg. 14 Aug. 2012. Velocity at the muzzle, magnetio speed chrony.

16 inch ARP Melonite. 2431 fps average for 10 shots

20 inch ARP Melonite 2514 fps ave.

For hunting, I'm still going to use the 110 AB and do more work with the 120 SST.
pavlovwolf  [Team Member]
8/17/2012 9:34:32 PM
Originally Posted By Operator42:
Factory SSA 140 Berger, 5800 ft, 85 deg. 14 Aug. 2012. Velocity at the muzzle, magnetio speed chrony.

16 inch ARP Melonite. 2431 fps average for 10 shots

20 inch ARP Melonite 2514 fps ave.

For hunting, I'm still going to use the 110 AB and do more work with the 120 SST.


How is that chrono holding up?

I remember you guys talking about it on 68forums. It does seem like the ticket.
Operator42  [Member]
8/17/2012 10:05:30 PM
Over 400 rounds chrony'ed and I haven't shot it yet!!!!!

It doesn't work with auto pistols, but it's a winner with the rifles. The bayonet is a type if plastic, i have some slight cutting from the flash hiders.

Ease of setup, and no issues with lighting makes me smile. When I get home, I pull out the micro SD card to plug into the computer and all the data is there, I can't wait to see what is next from this type of equipment.
MPD142  [Member]
8/17/2012 10:08:38 PM
I will add a few more data points to the graph. All were shot out of a Noveske 16" Recon 1/12 twist.

Factory Loads

SSA 110 Pro Hunters 2544 fps ES59 STD41

Hornady 110 V Max 2650 fps ES 11 Std 5

Hornady 110 HPBT 2638 fps ES 16 Std 8

Reloads/Handloads

Hornady 110 HPBT loaded with 27.0 grains Aliant Reloader 10X
2513 fps ES19 Std 10

Sierra Match King loaded with 25.0 grains Aliant Reloader 10X
2337 Fps ES 25 Std 13

Sierra Match King loaded with 27.5 grains Aliant Reloader 10x
2487 fps ES 10 Std 5

I was working on getting my TA31F ACOG dialed in that day for distance but with a few minor adjustments I was banging away on a IPSC steel plate all day long out to 600 yards. With any luck I will go out again this weekend as I have a few more test loads to see if I can narrow down what my rifle likes since I'm still working with some powder and projectiles to see what is going to work best. I have loaded up some 90 gr Speer TNT, Hornady 110 HPBT, Nosler 110 Accubond, and 110 Custom Competition and the Sierra Match Kings. I also have some of the Hornady 120 SST Factory loads to try out. I have some photos on my phone of the last session but I'm honestly not sure anymore which photos are groups of which loads. I guess I need better record keeping abilities.
WVHunter1s1k  [Member]
8/18/2012 11:51:38 AM
Thanks for the Crono results guys!
QuicksilverJPR  [Team Member]
8/19/2012 10:34:40 AM
Originally Posted By Operator42:
Over 400 rounds chrony'ed and I haven't shot it yet!!!!!

It doesn't work with auto pistols, but it's a winner with the rifles. The bayonet is a type if plastic, i have some slight cutting from the flash hiders.

Ease of setup, and no issues with lighting makes me smile. When I get home, I pull out the micro SD card to plug into the computer and all the data is there, I can't wait to see what is next from this type of equipment.


Don't count your chickens before they hatch!

I shot my first chrono with my .458 SOCOM. Needless to say, the chrono didn't make it....
346ci  [Member]
8/19/2012 11:17:13 AM
Nice numbers and are on par with everyone else, thanks for posting.
CavReconScout  [Member]
8/19/2012 7:19:11 PM
Just got back from the range a little bit ago. The day started out nice, with a NW breeze at 5 mph. As the day went on, however, some storms started to build up, and the wind began to swirl and change speed. I suck at reading wind, and I don't have a Kestrel (yet, lol), so I had to populate that information in iSnipe and Shooter with downloaded weather information. This has worked ok in the past, but not today. I still had fun, and learned at lot (like I REALLY can't read wind), but my groups out past 600 yds sucked. I shot about 25 rds of the 140 VLD at the 800 yd target, but didn't have a spotter, and couldn't get a reading on any corrections.

So I gave up, and shot this 5 rd group @ 600 yds just before leaving. SSA 140 VLD, and I wish I could claim I was aiming at the bolt :


Closeup:


So no 1000yd, or even 800yd, target info at this time. With any luck I can try again in a week or two.
EWP  [Member]
8/21/2012 12:42:20 PM
Originally Posted By Operator42:
Factory SSA 140 Berger, 5800 ft, 85 deg. 14 Aug. 2012. Velocity at the muzzle, magnetio speed chrony.

16 inch ARP Melonite. 2431 fps average for 10 shots

20 inch ARP Melonite 2514 fps ave.

For hunting, I'm still going to use the 110 AB and do more work with the 120 SST.


Same velocity(2434 fps) as my 16" Rainier barrel with the chrono set 10' from the muzzle, from my 24" Remy bolt action I'm getting 2620 fps from the factory 140gr loads.
Operator42  [Member]
8/21/2012 1:47:35 PM
Yo EWP.

Please check your PMs about that 6x45 barrel

Tks