Hey Sabotloader, the .54 caliberbarrel has a 1:70 twist. It's strictly a ball shooter. I also have a .45 caliber GM LRH barrel in 1:30 twist. I have a 4x ProDiamond on each.

Yeah BrushPopper, I have a nice supply of .54 cast balls that Bronko sent me. I've shot them side-by-side with Hornady swaged balls out of my Great Plains at 50 yardsand can't say that I saw any difference - at least at that range. Makes no difference anyway because I have 180 lbs. of soft lead sitting in the garage and if Lee ever catches up on their production of molds (mine is backordered) I won't be buying any more swaged balls.