What cast bulet did you use with BP loads? I wasn't aware any BP events allowed jacketed projectiles - that's a new one on me. Most BP ctg. events won't even allow gas checks.
: My bro's .45 3-1/4" Sharps really shot accurately with 110gr. BP and a 500gr. Hornady. He put one Hornady 500gr. RN lengthwise through a big bull moose. The bullet showed some minor expansion on exit the rump and the moose walked 3 steps after impact, then fell. They would hold into 1" at 100 meters for 3 shots, tang rear and blade front sights, off the bags, of course.