RE: Tumbler ?
My 'normal' routine is to clean (tumble) the cases before I resize them and then run them back in the tumbler for a short ride to remove the case lube. That's all before I trim and load. I know it's probably overkill but I like the looks of the highly polished brass plus I don't have to worry about anything on the cases scratching the dies. It probably doesn't help in the quality of the reloads either, but I feel better about it. Everyone's different.