Pony Express
Member
Hey everybody,
Just wondering what the minimum bullet weight would be for a 1:7 twist AR. I have been shooting 55 grn bullets but I'm worried about premature throat erosion and Im going to switch to a heavier bullet. I have heard good things about the 75 grain ammo but for the most part it is pretty expensive. will a 68/69 grn bullet work just as well?
Thanks
Just wondering what the minimum bullet weight would be for a 1:7 twist AR. I have been shooting 55 grn bullets but I'm worried about premature throat erosion and Im going to switch to a heavier bullet. I have heard good things about the 75 grain ammo but for the most part it is pretty expensive. will a 68/69 grn bullet work just as well?
Thanks