Today I was testing out how well an M4 could shoot 75gr bullets and tested the difference between a 1-7 twist and the 1-9. I normally shoot a lot of the M855 ammo for target shooting, just because it’s so darn accurate, but IMHO it is not the type of round that any civillian should consider using for self defense. The round penetrates entirely too much for urban environments and out of an M4 does not perform as well as 55gr ball ammo. I have noticed considereable accuracy differnces in my 1-7 twist rifle vs the 1-9 and I am a firm believer in that the 75gr HPBT is a better round for th M4 rifles even if you are using a 1-9 twist. I have tried swapping out some of my AR 15 Uppers to different bullet twists and I still think the shorter the rifle, the faster the twist and weights should be.
This entry was posted
on Friday, June 25th, 2010 at 10:01 am and is filed under AR15 Uppers, M4 Carbine Parts.
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