I once (once) shot a 2 1/2", 5 shot group at 50yards, with a 10 bore Brown Bess having a bayonet lug for a front sight.
Once.
I cannot do that with my 20 bore and cannot reliably do 2 1/2" at 25 yards from a rest, but the odd group works. Flyers do happen.
Seems to me, bobinthewoods' paper ctgs. shoot better in his 20 bore, than I can with patched balls in mine. I've been threatening to
try paper ctg. in my gun, but, well, I need a "round to-it'.
5 shots at 28yards from a rest, same gun. Go figure.
I just remembered, we, Taylor and I shot a 3" 5-shot group at 50yards with LB's(RIP) Pennsylvania fowler.
Taylor does really well with that gun in the smoothbore events.