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Posted: 3/12/2018 1:07:10 PM EDT
To determine potential long range performance of the Marine Corps' Mk318 projectile, we loaded up a reduced charge and fired it from a 10.5" 1:7" twist AR15.COM upper into calibrated 10% ordnance gelatin.
 Can The Marines' Wonder Bullet Keep Up With The Army's? Mk318 reduced velocity gel test Related Video  The Army's New Ammo Is a Long Distance Devastator - M855A1 Gel Test Last week's M855A1 Thread New videos from @bluefalcon and @10mm_ every Monday and Thursday. Check back for new threads or subscribe to AR15.Com's YouTube Channel. For those interested in ammo tests, Andrew has a thread for requests here. |
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Posted: 3/12/2018 1:14:24 PM EDT
[#1]
OST, I'll watch all these when I get home.
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Posted: 3/12/2018 1:35:01 PM EDT
[#2]
Move the blocs further away.
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Posted: 3/12/2018 2:11:42 PM EDT
[#3]
Very nice.
As always, Thank you for your time and energy . |
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Posted: 3/12/2018 2:17:30 PM EDT
[#4]
Cool vids OP.
Thanks |
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Posted: 3/12/2018 3:07:25 PM EDT
[#5]
Nice thanks for the vids. I have been stocking up on MK318 for awhile. Shot a hog with one about a month ago about 250m out and it performed great. Obliterated the heart and the backend of the bullet left the body.
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Posted: 3/12/2018 3:35:47 PM EDT
[#6]
Trail Boss powder should allow you to safely reach subsonic velocities, but it will not cycle the action.
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Posted: 3/12/2018 7:33:09 PM EDT
[#7]
Another great test! I think the longer neck is indicating that the MK318 is approaching its minimum frag velocity, while the instant fragmentation of the M855A1 indicates that it has a substantially lower minimum velocity.
In terms of reduced velocity, 14gr IMR 4064 + 11.5" barrel lead to a 1700fps velocity in this test of the 62gr Fusion: https://youtu.be/otou1Fws4cQ?t=2m32s |
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Posted: 3/12/2018 8:38:16 PM EDT
[#8]
318 is one of my favorites. Used to get tons of pulls.
It will penetrate a cinder block at 100yds. |
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Posted: 3/12/2018 10:01:59 PM EDT
[#9]
Quote HistoryQuoted:
Another great test! I think the longer neck is indicating that the MK318 is approaching its minimum frag velocity, while the instant fragmentation of the M855A1 indicates that it has a substantially lower minimum velocity. In terms of reduced velocity, 14gr IMR 4064 + 11.5" barrel lead to a 1700fps velocity in this test of the 62gr Fusion: https://youtu.be/otou1Fws4cQ?t=2m32s 
The neck from the Mk318 was longer at normal velocity, too. |
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Posted: 3/12/2018 10:15:52 PM EDT
[#10]
Awesome vids! Any chance to see them tested with a more common barrel length in the 16-18 inch range and perhaps a stout charge of H4895 or Varget?
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Posted: 3/13/2018 9:46:14 AM EDT
[#11]
Thank you for this test! I loaded pulls of these and run them with thru my A4 clone when I hunt, the results on two coyotes were devastating. These would do well on hogs.
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Posted: 3/13/2018 3:18:55 PM EDT
[#12]
Quote HistoryQuoted: Sure, but that guy's an asshole.
The neck from the Mk318 was longer at normal velocity, too. |
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Posted: 3/13/2018 10:03:59 PM EDT
[#13]
That would be really cool. Anything with enough resolution and high enough frame rate to really show what's going on is very expensive.
But @10mm_ already did that on The Wound Channel. I don't have the link handy. Hopefully he can post it. |
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Posted: 3/14/2018 6:41:20 AM EDT
[#14]
Another excellent vid. Thanks.
So can we assume that the MK318 may be a better hog load? Due to deeper penetration? |
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Posted: 3/14/2018 9:46:16 AM EDT
[#15]
Quote HistoryQuoted:
That would be really cool. Anything with enough resolution and high enough frame rate to really show what's going on is very expensive. But @10mm_ already did that on The Wound Channel. I don't have the link handy. Hopefully he can post it. 
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Posted: 3/14/2018 12:14:10 PM EDT
[#16]
I have some 318 pulls. What would be a decent load for them?
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Posted: 3/14/2018 4:07:42 PM EDT
[#17]
Quote HistoryQuoted:
I have some 318 pulls. What would be a decent load for them? LC brass 25.0 gr of RL15 or Varget MAX LOAD |
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Posted: 3/14/2018 4:09:35 PM EDT
[#18]
Quote HistoryQuoted: As always, refer to a reloading manual, reduce starting load by 10% and work up to what is safe for YOUR rifle... LC brass 25.0 gr of RL15 or Varget MAX LOAD |
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Posted: 3/14/2018 6:32:51 PM EDT
[#19]
Quote HistoryQuoted:
I wonder how that load would work on 62gr Federal fusion pulls. |
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Posted: 3/14/2018 9:00:19 PM EDT
[#20]
Quote HistoryQuoted: Interesting. I wonder if the steel core being shoved backwards into core of the bullet during impact is whats causing the instant fragmentation. Ive heard that this is how 77gr TMK also achieves its instant fragmentation even at low velocities. Any chance we can Gofundme a high speed camera for you? |
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Posted: 3/14/2018 9:05:45 PM EDT
[#21]
Quote HistoryQuoted: the steel core in the 855a1? cuz 318 doesnt have a steel core. Does anyone know if Mk318 fragments like a traditional FMJ or does it require hydraulic expansion via the hollow point? |
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Posted: 3/14/2018 9:29:48 PM EDT
[#22]
Quote HistoryQuoted:
I wonder how that load would work on 62gr Federal fusion pulls. Quote HistoryQuoted:
Quoted: As always, refer to a reloading manual, reduce starting load by 10% and work up to what is safe for YOUR rifle... LC brass 25.0 gr of RL15 or Varget MAX LOAD |
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Posted: 3/14/2018 9:45:21 PM EDT
[#23]
Quote HistoryQuoted: Posing the question why M855A1 fragments instantly even at low velocity while Mk318 SOST does not. My hypothesis is that the steel core of the M855A1 being shoved back into the core of the bullet is what is causing instant fragmentation. Does anyone know if Mk318 fragments like a traditional FMJ or does it require hydraulic expansion via the hollow point? |
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Posted: 3/15/2018 9:41:30 AM EDT
[#24]
Thank you for this.
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Posted: 3/15/2018 11:15:06 AM EDT
[#25]
Quote HistoryQuoted:
Posing the question why M855A1 fragments instantly even at low velocity while Mk318 SOST does not. My hypothesis is that the steel core of the M855A1 being shoved back into the core of the bullet is what is causing instant fragmentation. Does anyone know if Mk318 fragments like a traditional FMJ or does it require hydraulic expansion via the hollow point? Quote HistoryQuoted:
Quoted: the steel core in the 855a1? cuz 318 doesnt have a steel core. Does anyone know if Mk318 fragments like a traditional FMJ or does it require hydraulic expansion via the hollow point? |
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Posted: 3/18/2018 6:05:46 PM EDT
[#26]
Sweet! Now I just have to figure out how to buy this stuff without having to rob a bank first...
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Posted: 3/26/2018 7:00:20 AM EDT
[#27]
Great stuff.....much thanks
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