Originally Posted by Iron Worker
In my 22-250AI with "8" twist the Sierra book says I can get 3,300 with 80 gr bullet. I was loading 39grs of H4350 and getting 3,450 with 75gr A-max. Now you say out of a 8" twist BBL you can shoot a 90 gr bullet? I thought that bullet requires a 7" twist? Were those 90 gr Berger bullets?
it will shoot them faster but best accuracy was around 3400-50
my bbl is hart 1-8 twist and it does shoot 90gr bergers. I shot some 90gr sierra to and they shot fine. I think it will shot the 90gr in a 1-8 because of the velocity of the 22-243. I have shot mine at targets to 1200 yards without any problems from the 90 gr bergers.