Cleanest in my stainless Omega goes from cleanest to less clean in following order: Black Mag'3, APP ffg, Goex Pinnacle, Tripple Seven (down the list because of the crud ring in my rifle), Pyrodex, Goex black ffg. I have not had time or been able to find any of the others mentioned. Pyrodex is really dirty but the accuracy in my Omega is impressive. I think my best groups go from best to worst as follows: Pyrodex, Black Mag'3, App and have not shot the others enough to make a decision. I need more time behind the rifle.