AR Sponsor
MK318 Mod 0 Accuracy (Page 4 of 5)
|
Originally Posted By supermanct:
i have had better luck with milder loads Just about every 5.56mm load that I've ever tested has produced improved accuracy simply by reducing the muzzle velocity. .... |
All that is necessary for Trolls to flourish, is for good men to do nothing.
In God We Trust. Everyone else must post data.
In God We Trust. Everyone else must post data.
|
Originally Posted By Molon:
Just about every 5.56mm load that I've ever tested has produced improved accuracy simply by reducing the muzzle velocity. .... Originally Posted By Molon:
Originally Posted By supermanct:
i have had better luck with milder loads Just about every 5.56mm load that I've ever tested has produced improved accuracy simply by reducing the muzzle velocity. .... I'm sure there's a velocity sweet spot (barrel dependent, of course) for each bullet design. Pushing them as fast as you can just magnifies the effects of individual bullet differences on flight and thus accuracy. And .224" bullets ain't particularly forgiving in manufacturing, because they are small; small dimensions and reasonable cost are enemies when it comes to precision. So here's a practical question. If I were to plan out a practical and accurate load using Hornady's wonderful 55gr FMJs and a "5.56mm-class" loading, how much below M193-like muzzle velocity would you expect I'd need to go to optimize that bullet's performance? And would reducing the MV for best accuracy require adjusting M193-specific iron sights for such a load? (Honest question - I don't have a ballistics calculator handy...). And ditto for a 62 grain OTM bullet... 
|
"--you can't conquer a free man; the most you can do is kill him."
Heinlein
NRA Life Member
Glock Certified Armorer
Certified AR15 Armorer
Certified M1911 Armorer
Heinlein
NRA Life Member
Glock Certified Armorer
Certified AR15 Armorer
Certified M1911 Armorer
|
Originally Posted By GHPorter:
I'm sure there's a velocity sweet spot (barrel dependent, of course) for each bullet design. Pushing them as fast as you can just magnifies the effects of individual bullet differences on flight and thus accuracy. And .224" bullets ain't particularly forgiving in manufacturing, because they are small; small dimensions and reasonable cost are enemies when it comes to precision. So here's a practical question. If I were to plan out a practical and accurate load using Hornady's wonderful 55gr FMJs and a "5.56mm-class" loading, how much below M193-like muzzle velocity would you expect I'd need to go to optimize that bullet's performance? And would reducing the MV for best accuracy require adjusting M193-specific iron sights for such a load? (Honest question - I don't have a ballistics calculator handy...). And ditto for a 62 grain OTM bullet...
Originally Posted By GHPorter:
Originally Posted By Molon:
Originally Posted By supermanct:
i have had better luck with milder loads Just about every 5.56mm load that I've ever tested has produced improved accuracy simply by reducing the muzzle velocity. .... I'm sure there's a velocity sweet spot (barrel dependent, of course) for each bullet design. Pushing them as fast as you can just magnifies the effects of individual bullet differences on flight and thus accuracy. And .224" bullets ain't particularly forgiving in manufacturing, because they are small; small dimensions and reasonable cost are enemies when it comes to precision. So here's a practical question. If I were to plan out a practical and accurate load using Hornady's wonderful 55gr FMJs and a "5.56mm-class" loading, how much below M193-like muzzle velocity would you expect I'd need to go to optimize that bullet's performance? And would reducing the MV for best accuracy require adjusting M193-specific iron sights for such a load? (Honest question - I don't have a ballistics calculator handy...). And ditto for a 62 grain OTM bullet...
If you reduce the M193 velocity by ~150 FPS, you should start to see acceptable results. 
..... |
All that is necessary for Trolls to flourish, is for good men to do nothing.
In God We Trust. Everyone else must post data.
In God We Trust. Everyone else must post data.
|
Originally Posted By Molon:
If you reduce the M193 velocity by ~150 FPS, you should start to see acceptable results. ..... Originally Posted By Molon:
Originally Posted By GHPorter:
So here's a practical question. If I were to plan out a practical and accurate load using Hornady's wonderful 55gr FMJs and a "5.56mm-class" loading, how much below M193-like muzzle velocity would you expect I'd need to go to optimize that bullet's performance? And would reducing the MV for best accuracy require adjusting M193-specific iron sights for such a load? (Honest question - I don't have a ballistics calculator handy...). And ditto for a 62 grain OTM bullet...
If you reduce the M193 velocity by ~150 FPS, you should start to see acceptable results. ..... |
"--you can't conquer a free man; the most you can do is kill him."
Heinlein
NRA Life Member
Glock Certified Armorer
Certified AR15 Armorer
Certified M1911 Armorer
Heinlein
NRA Life Member
Glock Certified Armorer
Certified AR15 Armorer
Certified M1911 Armorer
|
Originally Posted By GHPorter:
Interesting. I'd have expected to need to slow down quite a bit more than that. Cool info! And 150 or so FPS shouldn't affect iron sight settings enough to worry about. Very nice to know. Originally Posted By GHPorter:
Originally Posted By Molon:
Originally Posted By GHPorter:
So here's a practical question. If I were to plan out a practical and accurate load using Hornady's wonderful 55gr FMJs and a "5.56mm-class" loading, how much below M193-like muzzle velocity would you expect I'd need to go to optimize that bullet's performance? And would reducing the MV for best accuracy require adjusting M193-specific iron sights for such a load? (Honest question - I don't have a ballistics calculator handy...). And ditto for a 62 grain OTM bullet...
If you reduce the M193 velocity by ~150 FPS, you should start to see acceptable results. ..... The 150 FPS isn't any guarantee, it's just a good starting point. .. |
All that is necessary for Trolls to flourish, is for good men to do nothing.
In God We Trust. Everyone else must post data.
In God We Trust. Everyone else must post data.
|
Has anyone seen the mod 1 non lead silver tip mk318 ? I have a few hundred of the 2010 run
and a few hundred of the 2014 run and sitting on about 1500 pulls. My 14.5 colt likes 25.0gr of cfe223 and a cci41. I always wanted to try the WC 842 pull down powder . Would love to find a ab49 ammo can also. |
|
what do you guys think about using mk318 as a SD round in civilian terms? i feel like the copper core could be too much of a liability when it passes clean through a bag guy.
as a battlefield round, its probably up there as one of the best along with tsx, gmx and 855a1 for barrier penetration. just not sure how i feel about carrying it in my truck gun right now. i think fusion msr would be adequate to stop penetrate a windshield if needed. |
|
Originally Posted By mr_h:
what do you guys think about using mk318 as a SD round in civilian terms? i feel like the copper core could be too much of a liability when it passes clean through a bag guy. as a battlefield round, its probably up there as one of the best along with tsx, gmx and 855a1 for barrier penetration. just not sure how i feel about carrying it in my truck gun right now. i think fusion msr would be adequate to stop penetrate a windshield if needed. With that said, I have been buying and playing with the MK318 Mod 0 lately. I'm very intrigued by the idea of a round with very short neck, explosive frag, coupled with deep penetration. Most of my MK318 Mod 0 groups have been around 2.5MOA (5 shots at 100). My worst group was one solitary 4" group, thanks to a flier. My best was 1.75". This is in line with the XM193 that I stack and is my practice and tier 2 ammo. The MK318 also has about the same POI as the loads I shoot, which is important since my BH 50 TSX and the FBI 62gr tactical bonded loads have a weird POI shifts from my practice loads. Just today, using a PSA upper, 16" middy with extra heavy barrel, "premium" chrome lined (non CHF), I shot the following 5 shot groups at 100 yards. Using ACOG, TA11 G-H. MK 318......................2.5" MK 318......................2.7" GECO 55gr 223..........1.7" MK262 77gr...............1.6" (mixed up BH, IMI, and CBC leftovers) XM193 LC08...............2.9" Fed Fusion (non MSR) 2.7" Looking at Molon's excellent post, most of his MK318 shots are grouping fairly good with 2 or 3 "fliers" that opened up the group to 2.7-2.9". One could statistically get some excellent 5 shot groups... Which is another example of why 10 shot groups are more statistically significant. |
|
My URG with a FN 10.3" SOCOM barrel likes all three of these combat rounds. I only use M855 for range use. Attached File CD |
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15&16'
Afganistan: 09,10,11',14',17' & 18'
Iraq: 91,03,04,05,06,08,09,15&16'
Afganistan: 09,10,11',14',17' & 18'
|
Originally Posted By mybronco2:
Gunbroker maybe? It's not just sitting on a shelf everywhere, but sure it can be found. Get your wallet ready. |
|
Wow didn’t know MK319 was still around I have a few cases from years ago, and never heard it come up anymore so figure it was an obselete round - that there may be better ones out there now ...I recall them costing quite a fortune around 6 years ago when I picked them up.
The MK318 I’ve seen last couple years. Picked up a few cases from Bone Frog, forget the price but wasn’t the cheapest.. |
|
Originally Posted By Tejas1836:
Any MK318 mod0 T556TNB1 still available? |
Certified Sig Armorer-Classic Pistols
Joined:
Mar 2008
Posts:
2797
EE: 100% (245)
MI, USA
|
This is where I bought 2 500rd cases of the MK318 Mod0 from. They are GTG
But I see the price as went up, a bunch from what I payed a few years back. |
NRA Benefactor Member, Veteran; US Army 5th Corps 1970-1972
The only time in my life when I got to Rock-N-Roll, and the ammo was free!!
(Avatar is the Unit's shoulder patch) #425, LotD
The only time in my life when I got to Rock-N-Roll, and the ammo was free!!
(Avatar is the Unit's shoulder patch) #425, LotD
|
Originally Posted By dubya3: Mod 1 will probably start hitting a few of the more hole in the wall sites this year I'm guessing. Federal has a contract for it currently, I was able to get two 1k cases of it late last year. One of these days I'm gonna do some velocity and accuracy tests with the missing sealant ones. |
|
Originally Posted By Alexbrooks:
Mk318 Mod 0 is obsolete and no longer made. Federal now makes the Mk318 Mod 1. It’s got. Little better BC and it is a nickel coated projectile. They call it the silver bullet |
|
Originally Posted By JohnDough:
https://www.hstoday.us/federal-pages/dhs/federal-premium-ammunition-awarded-116m-in-dhs-dod-contracts/ Originally Posted By JohnDough:
Originally Posted By Alexbrooks:
Mk318 Mod 0 is obsolete and no longer made. Federal now makes the Mk318 Mod 1. It’s got. Little better BC and it is a nickel coated projectile. They call it the silver bullet |
|
Originally Posted By 87GN:
Glad to see that you're still here. |
Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. Those who torment us for our own good will torment us without end for they do so with the approval of their own conscience.
-C. S. Lewis
-C. S. Lewis
|
Still have a case of it. Going to use it after I'm out of Mk262. Got cases of M855A1 for range use. Attached File CD |
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15&16'
Afganistan: 09,10,11',14',17',18',19' & 20'
Iraq: 91,03,04,05,06,08,09,15&16'
Afganistan: 09,10,11',14',17',18',19' & 20'
|
Looks like they are finally selling the bullets from the mk318 pretty good deal too just have to buy 2k https://www.midwayusa.com/product/1022739538 |
| Is that bullet actually purple? I’ve had some recent experience with .40 S&W cases stained purple, so I had to ask… |
"--you can't conquer a free man; the most you can do is kill him."
Heinlein
NRA Life Member
Glock Certified Armorer
Certified AR15 Armorer
Certified M1911 Armorer
Heinlein
NRA Life Member
Glock Certified Armorer
Certified AR15 Armorer
Certified M1911 Armorer
|
Originally Posted By mcantu: it's silver https://cdn.shopify.com/s/files/1/0827/9909/products/T556TNB1NL-2T_2048x.jpg Damn that is some pretty shit. |
|
Originally Posted By Molon: Nickel-plated. https://www.ar15.com/media/mediaFiles/28568/mk318_mod_1_pulled_bullet_001-2179771.jpg ... How does the bullet length compare to the Mod 0? |
|
I found myself curious, so I fired 4 ten shot groups, consecutively (letting the weapon cool, though), yesterday with mk318 mod 0 sost. I changed my position behind the gun for one of the groups, and you can see it shifted left and shows a bit of vertical movement...no butterfly shots here, though. The weapon used is a Hodge mod 2 with a KAC 11.5" barrel and URX4. It is topped with an nx8 1-8 in a Badger c1 mount. The muzzle is tipped with a MAMS, and this range session saw a QDC 5.56 can in place. The groups were fired from the bench with a bag under the front of the rail, and under the buttstock. Distance is 100 yards. Attached File Attached File Attached File I changed position behind the gun for this group. Attached File |
|
Originally Posted By JohnDough: 100 yards. Originally Posted By JohnDough: Originally Posted By TGH456E: @ John............................ distance? 50yds? @zhukov....................... They were............... about 5yrs ago. Midway was selling 2500 bullet boxes of them. 100 yards. Great..............THANKS! I'd done some testing of them and posted it as well............... https://www.ar15.com/forums/AR-15/200yd-Groups-Velocities-of-Winchester-62OT-mk318-64-GD-and-others-/16-744061/?page=1&anc=bottom#bottom |
Joined:
May 2025
Posts:
1
EE: 0% (0)
MI, USA
|
Originally Posted By EZvalor: Mod 1 has produced tighter groups in general compared to Mod 0 from 12.5 LMT and 16 AUG w/ 1/7 barrel. Not sure exactly why, but probably the nickel plating and slightly better BC (longer leadless projectile) might have smth to do with it. Uh what?  Nickel plated brass has nothing to do with the inherent accuracy of a load nor does the BC of a bullet. The inherent accuracy has everything to do with its consistency of manufacture and its initial development and testing. Since this is your first post I highly suggest reading: https://www.ar15.com/ammo-oracle/ Before you develop a reputation of making grossly inaccurate posts. |
|
Originally Posted By vicious_cb: Uh what? Nickel plated brass has nothing to do with the inherent accuracy of a load nor does the BC of a bullet. The inherent accuracy has everything to do with its consistency of manufacture and its initial development and testing. Since this is your first post I highly suggest reading: https://www.ar15.com/ammo-oracle/ Before you develop a reputation of making grossly inaccurate posts. The projectile is the nickel plated component. The brass in mod 1 is uncoated. |
|
Originally Posted By JohnDough: The projectile is the nickel plated component. The brass in mod 1 is uncoated. Thanks for the correction, I guess I blocked alot of the details of mod 1 out of mind from how idiotic the program was from going to a environmentally friendly version of the bullet to choosing to nickle plate it because from (Sal Fanelli himself) the other color tips were taken and it looked cool with the added moniker 'the silver bullet' being an inside USMC joke. |
|
Originally Posted By vicious_cb: Thanks for the correction, I guess I blocked alot of the details of mod 1 out of mind from how idiotic the program was from going to a environmentally friendly version of the bullet to choosing to nickle plate it because from (Sal Fanelli himself) the other color tips were taken and it looked cool with the added moniker 'the silver bullet' being an inside USMC joke. I guess it's possible that the nickel plating did something for the accuracy but I highly doubt it. The lead-free bullet with nickel plating kinda turned me off from the Mod-1 and I invested a bunch into the Mod-0 when it was available. I don't shoot it much since 100 yards groups with the Mod-0 depress me. |
MK318 Mod 0 Accuracy (Page 4 of 5)
AR Sponsor