Re: Bullet tumbling
I deprime with a hand decapper, chase the pockets with a tool & clean the necks with CarbonKiller on a greenie pad. Then run the brass in a vibratory cleaner for ~hour, with Lyman EZ-pour media + ~a teaspoon of mineral spirits.
I do it soon as possible on return from the range(while carbon is easy to remove), and before any die will touch it. When I pull each case out, I pour out the media while rapping on the case head with the handle of a small screwdriver(to dislodge any in the flash holes).
After sizing is completed, I might ultrasonically clean or not, but follow with a polishing in the same media with a teaspoon of brass polish('Rooster Bright' or frankford arsenal). Several hours of this..