I use a stainless steel pin tumbler to clean brass now. I always hated the vibratory tumblers with corncob or walnut shells, just because of all the dust and the lead salts it carries. I switched to SS wet cleaning partly because of that, and partly because of input from a former Small Arms and Ammunition Test Director from Aberdeen Proving Ground talking about damage to barrels from carbon, and primer residue in particular. He also talked about barrel longevity and how he measured or determined that. I have high confidence in what he has to say, so that stuff pushed me over the edge into wet SS pin cleaning. I don't regret it at all.
