thumler
I use a thumler tumbler model T. I can put about 50 243 cases in it at a time. Tumble for about 2 hours with a tad of Flitz metal polish and walnut shell media. Works for me, I would like a larger tumbler but got it cheap so I cant complain. It has worked for many years for me and shows no signs of quitting. You can pick them up on ebay for $50ish sometimes, less for a used one I think. I dont really go for sparkling new looking cases, I think its better to under tumble them than over tumble personally.