I shoot an early (1972, first year) ROA. It likes .457 ball or .452 conicals. I cheat and buy plain lead .45acp lrn meant for SASS Wild Bunch shooting. Load with 3F Swiss, 3F T7 or 4F black (when I can find some).
Have trsted both projectiles in rank feral boars taken during quarterly clean out shoots. Both ball and conical will go completely through rib cages or skulls. Both get stuck in heavy shoulder gristle.
I do find the .457 is more accurate on paper. The .452 tends to have an occasional flyer. Just for giggles, found a box of .452 jhp in the gear I inherited from a friend last year. Loaded and fired 1 bullet. Not worth the powder invested, was a flyer from the word go. Jacketed bullets in percussion revolvers stay undersized.
