For patched ball shooting? Of those three powders I would rank them GOEX #1, Pyrodex #2 and T7 #4. If you can get GOEX that's what I would use. (I buy mine by the case.
) T7 won't do anything GOEX can't do, and usually doesn't do it as well.
Do as
CoyoteJoe says. Get yourself some pure cotton pillow tick from a fabric store and cut your own patches. Square is fine - shoots same as round. Try olive oil lube. You might like it. That's all I use these days.