I use both a tumbler and shaker. Tumbler to get them clean, then put them in a shaker (OLD Midway one) to polish them so they look factory new. Might not need them that way, but like them that way, and the tumbler gets the dirt off so they don't scratch my dies. A friend of mine puts theirs in a thumblers tumbler, with hot water, and uses soap as a case lube, so the cases actually "washed". After washing, changes the water twice to get the soap out/off, then dries them in the sun (he lives in Arizona). This guy a top competitive shooter, and loads 12-15,000 rounds at a time. Washing them, doesn't leave any media in any place, and cleans the primer pocket too.
