[SnakeLogan]

Just curious. I've searched all over and still can't find a pic of a 6.8 SPC fmj in gel. I'm wondering if it would yaw like this 5.45x39 fmj.

Sure creates a nasty wound.

 

[Test_User]

As I understand it from Dr Roberts yes but with a much larger temp stretch and larger path.

 

[DocGKR]

Actually, we have never shot a 6.8 mm FMJ load--none are currently in service.

 

[constructor]

Doc,
Do you believe 54k psi is the max pressure a 6.8 should operate at in the AR15?
sorry for the slight detour of thread.

 

[SnakeLogan]

Actually, we have never shot a 6.8 mm FMJ load--none are currently in service.

Thanks for the reply. If you do ever test a 6.8 FMJ load, can you post it here?

 

[Test_User]

Actually, we have never shot a 6.8 mm FMJ load--none are currently in service.

I was basing that off of what you had shown other FMJS do when they do not frag. Wouldn't a larger diameter bullet create a larger permanent wound path given no fragmentation or expansion from either. Upsetting the larger, longer, heavier bullet wound create a larger wound path than a shorter, smaller, lighter bullet again assuming no significant expansion nor fragmentating.

 

[DocGKR]

All spitzer type rifle bullets yaw in tissue. The question is always how deep do they penetrate before yawing and how large is the PC and TC are at that point. Longer, wider, faster bullets make larger holes and greater stretch when they yaw.

I suspect a 6.8 mm FMJ will be somewhat like a 7.62x39mm lead core FMJ.

 

[SnakeLogan]

I suspect a 6.8 mm FMJ will be somewhat like a 7.62x39mm lead core FMJ.

So you don't expect it would fragment?