If that is correct, Colt and DOD made an epic blunder with the M16A2 and M4.
Thanks, I have several 5.56, and they range from 1in7, 1in8 to 1in9. I’m thinking I would like to standardize to 1 twist rate for all.Bert the 1:7 barrels are going to favor the heavier bullets 69-77 grains typically. My 1:7 barrels shoot ok with 55 grain Bullet’s but shoot really well with 75-77 grains.
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