62/65 grains real black powder, thin card, lubed felt wad or lubed faux-tow wadding, about 1 oz (75 grain powder measure) of #5 lead shot, two more thin cards.
When I get a chance I'll spend some time and resources at the patterning board using just thin card wads like @Britsmoothy he gets more time afield than most, and posts his results, doesn't just tell ya something works "well enough" without showing you that is does.
I hardly ever pattern board anything unless something is very wrong, like birds not falling out of the sky...
I don't think it is necessary to chase the perfect pattern because it's rarely, once you've printed a perfect pattern, repeatable anyway.
As long as there isn't a huge hole in the middle because you've over wadded it just crack on.