I won a State Championship with my T/C. 50 cal stock Hawken back in 1974
It would shoot 3/4 inch 5 shot groups at 50 yds. Load was Goex FFF Black Powder, .500 cast round ball, .020 thick patch. Oh the load was 70 grs.
Patch was Teflon coated, and the gun was a Flintlock.