what is the max velocity of a 6mm 65 to 68 grain J-4 Jacket bullet fired from a 1-14 twist barrel before you would expect failure? Is there a velocity short of failure when the jackets may bulge in flight and cause flyers? Tks
Gerg, via 1:14" twist, chambered for the 6MM Cat-Bird (a version of the 6MM/o6 Ackley Imp.), some people have reported shooting my 67/71 Gr. FBs at up to 4100+FPS - without failures! Good shootin'! RG
Gerg, via 1:14" twist, chambered for the 6MM Cat-Bird (a version of the 6MM/o6 Ackley Imp.), some people have reported shooting my 67/71 Gr. FBs at up to 4100+FPS - without failures! Good shootin'! RG