Uberti Walker.

40 grains Krank's Medium, gently tamp down flat with a close-cylinder-fit dowel. Then gently, fill over the powder with semolina powder to level with the top of cylinder. Then squeeze down a good soft 457 Round Ball to just level with the cylinder top.

When I wear my robot eyes, I really have done 1.5 inches at 25 yards for 5/6 - always seem to get 1 'flier' no matter what I do, no point fibbing.

That's good enough for what is a very powerful load. Semolina is the ticket, but not many indoor clubs allow it.

(robot eyes - a rubber iris stuck on my glasses with a small 1.5mm hole, without that, the sights and target are just blurs, eyesight after 40 sucks)