Re: Best twist rate for 62 grain and 77 grain 5.56 mm ammo?
The 1:7 is better for heavier loads.......you need to decide what loads you are going to shoot, as the 1:9 or 1:12 are better for lighter bullets.
Originally Posted by Grenadier
1:9 is okay all around if you can't decide what loads you want to shoot.
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