My 10 and 9 bore shot best with 1 & 5/8oz of #4 shot and 4 & 1/2 drams of Goex 2f. I tried lots of shot and powder combinations...ranging from 1 & 1/4 oz up to 2 oz of shot. With Goex and Schuetzen powder....contrary to what you hear I thought the Goex shot cleaner out of a shotgun than the Schuetzen did.
I stopped shooting black...once the fascination wore off I quickly tired of the cleaning. After a long cold day in the winter woods gun cleaning is the last thing I want to do at dark.
(I'm more of a turkey hunter than a waterfowl hunter)