This is a 28 yard, 5 shot group with my 20 bore flinter. This gun has a slight standard choke, perhaps IMP CYL.
The load combination is listed on the target.
I've not tested YET with bare ball and wads.
One of the guys in our club has only one muzzleloader, a 20 bore Pennsylvania fowler he built himself. He uses
about .020" patches and a .595" pure lead ball, with 85gr. 3F - he shoots that gun as well as most of us shoot
rifles. Amazingly accurate. That is another test I must make, 85gr. 3F and patched ball in my smooth bore.
We have zero fouling issues with the combinations we use and loading is unchanged for a day's shooting - no wiping.