I shot a Traditions Deerhunter.50 cal. with a patched roundball since the 80's (1:66 twist). Took Deer with the gun... missed or misfired on multiple times what I took of course.
Fast forward to last week. I bought a Deerstalker from a member last Thurs (Retiredusne8). Took it to the range Saturday. Being comfy with Patched balls, and having a gaggle of lead, that's what I used. Book said 90 grains FF with a .50 PRB so that''s what I used. Took 5 shots off a bench at 50 yds. 1st was 8" high, 3" left, and the next 4 shots I tweaked a bit on the rear sights (windage/elev. to where the last shot was zeroed in 1/2" high and centered.
Most impressive however, was the ignition on this sucker. My Traditions I could never find a good ignition combo. Retusne8 hadan Black English Flint in it, and that's what I used. Honestly, there was no noticeable delay on ANY of the 5 shots once the flint hit frizzen. I was IMPRESSED. primed with FFFF. I also picked and cleaned pan between shots.