I use a walnut media but, it does not clean really dirty cases even after 4 or 5 hours. What is the next step up for dirty cases?
+1 on the lizard litter. I use a little bit of Flitz in mine.If you are using walnut media from a gun site or mfg is it probably very fine and has a rubbing compound mixed with it. and does not do a very good job. Go to a pet store and ask for lizard litter or snake bedding, it is rough cut walnut and mix a couple of tabelspons of turtle wax chrome polish with each batch, let the polish get asorbed before putting the brass in. been doing this for years and the worst range brass comes out fine, and it is a lot cheaper than regular media.