Loc: this side of the black stump
I have been considering a similar thing. Looking at a .454 BFR in either a 6.5 or 7.5 barrel. Does anyone have info on how much velocity is lost going to the shorter barrel? Most load data is based on 9.5 barrel length and I know my current 7.5 is a lot slower than those figures. Ballistics by the Inch don't have data for the .454.