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Posted: 3/12/2018 1:07:10 PM EDT
Link Posted: 3/12/2018 1:14:24 PM EDT
OST, I'll watch all these when I get home.
Link Posted: 3/12/2018 1:35:01 PM EDT
Move the blocs further away.
Link Posted: 3/12/2018 2:11:42 PM EDT
Link Posted: 3/12/2018 2:17:30 PM EDT
Cool vids OP.

Thanks
Link Posted: 3/12/2018 3:07:25 PM EDT
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.
Link Posted: 3/12/2018 3:35:47 PM EDT
Trail Boss powder should allow you to safely reach subsonic velocities, but it will not cycle the action.
Link Posted: 3/12/2018 7:33:09 PM EDT
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
Link Posted: 3/12/2018 8:38:16 PM EDT
318 is one of my favorites. Used to get tons of pulls.
It will penetrate a cinder block at 100yds.
Link Posted: 3/12/2018 10:01:59 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By spydercomonkey:
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
View Quote
Sure, but that guy's an asshole.

The neck from the Mk318 was longer at normal velocity, too.
Link Posted: 3/12/2018 10:15:52 PM EDT
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?
Link Posted: 3/13/2018 9:46:14 AM EDT
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.
Link Posted: 3/13/2018 3:18:55 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By bluefalcon:

Sure, but that guy's an asshole.

The neck from the Mk318 was longer at normal velocity, too.
View Quote
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?
Link Posted: 3/13/2018 10:03:59 PM EDT
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.
Link Posted: 3/14/2018 6:41:20 AM EDT
Another excellent vid. Thanks.

So can we assume that the MK318 may be a better hog load? Due to deeper penetration?
Link Posted: 3/14/2018 9:46:16 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By bluefalcon:
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.
View Quote
I figured out exactly how M855A1 fragments so early, using Phantom high speed cameras.
Link Posted: 3/14/2018 12:14:10 PM EDT
I have some 318 pulls. What would be a decent load for them?
Link Posted: 3/14/2018 4:07:42 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By drewQ22:
I have some 318 pulls. What would be a decent load for them?
View Quote
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
Link Posted: 3/14/2018 4:09:35 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By DPeacher:

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
View Quote
I wonder how that load would work on 62gr Federal fusion pulls.
Link Posted: 3/14/2018 6:32:51 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By jaqufrost:

I wonder how that load would work on 62gr Federal fusion pulls.
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Probably expand bigly, end up looking like a nickel, and get about 9-10" pen.
Link Posted: 3/14/2018 9:00:19 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By vicious_cb:

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?
View Quote
the steel core in the 855a1? cuz 318 doesnt have a steel core.
Link Posted: 3/14/2018 9:05:45 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By mr_h:

the steel core in the 855a1? cuz 318 doesnt have a steel core.
View Quote
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?
Link Posted: 3/14/2018 9:29:48 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By jaqufrost:
I wonder how that load would work on 62gr Federal fusion pulls.
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By jaqufrost:
Originally Posted By DPeacher:

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
I wonder how that load would work on 62gr Federal fusion pulls.
Funny you should ask, because that is exactly what I load. I let a buddy of mine shoot some that I loaded. Very accurate in his rifles, so he traded me a bottle of The Macallen 17 for 150 rounds. Of course I would have just given him the ammo, and we were drinking the bottle together anyway... but I digress. A few months later he shot a 200 lb boar at a bit over 200 yards broadside through the shoulders. The boar only made it a few yards before it died. He recovered the bullet just under the skin on the far shoulder, which he showed to me. Perfectly mushroomed so the cap was almost even with the bottom of the base. Just by looking at it, I'd say it was near .40" across. Didn't have a scale to weigh it, but the jacket and core a definitely bonded.
Link Posted: 3/14/2018 9:45:21 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By vicious_cb:

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?
View Quote
There is absolutely nothing wrong with a 2" neck. iirc, the target for both Mk318 and M855A1 was for the neck to be 4" or less
Link Posted: 3/15/2018 9:41:30 AM EDT
Thank you for this.
Link Posted: 3/15/2018 11:15:06 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By vicious_cb:
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?
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By vicious_cb:
Originally Posted By mr_h:

the steel core in the 855a1? cuz 318 doesnt have a steel core.
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?
PM sent
Link Posted: 3/18/2018 6:05:46 PM EDT
Sweet! Now I just have to figure out how to buy this stuff without having to rob a bank first...
Link Posted: 3/26/2018 7:00:20 AM EDT
Great stuff.....much thanks
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