I too pick up a lot of range brass, and being cheap, shoot them till they fail. I mentioned my cleaning method a while back (i'm not sure which forum it was) and got blasted by a couple of guys with about 10 thousand posts between them so I did'nt bother arguing, but I still use it and have for many years. What I use is silica sand that you can pick up for about 4 dollars for 50 lb. I use a small cement mixer and pour in a couple capfuls of simple green. You just want the sand DAMP, if you get it WET it willtake quite a while to work. Anyway I let it run all night and in the morning the brass usually has a dull satin finish. Then I give the brass about 100 revolutions in the separator, and run it in some walnut for a couple hours, then separate again then run it through the corncob with brass polish for a couple hours. that usually gets inside, outside, and primer pockets nice and shiney. The guys that said it was a bad idea were worried about (maybe) scratching their dies and (maybe) the bore of the weapon. I have a friend that works at the Rock Island Arsenal and has been involved in lots of weapons testing and has access to some real sophisticated test equipment, explained the question and had him check my dies for scratches. There were some scratches, but not much different from HIS dies that had Never been exposed to sand. Both sets of dies had close to 50k rounds run through them. He said anytime you run metal against metal there are going to be scratches. This is an opinion issue, not a safety issue so use it if you want, or not. It DOES clean brass and is not messy or expensive. I did some experimenting with a vibrating tumbler and it works there also.....about 200 rounds of .45 ACP and cover with the silica sand add the simple green and check later.