American Pioneer Powder is very clean burning. It leaves a gray dust in the barrel when used. Pinnacle is another very clean burning powder. Whether you can shoot 50 or 5000shots without swabbing or cleaning is a mute point because at the end of the day you still have to clean the rifle. Although with Pinnacle and American Pioneer Powder, it will usually clean up in about five patches.

Triple Se7en is another clean burning powder. It is user friendly also. There are issues with crud rings in some inline rifles, but Triple Se7en really isa good powder.

I've never used Black Mag3.