I’ve done it without issue. I wouldn’t tumble it too much but if you don’t get obsessive you should be fine.
what's too much ?
I dunno, you tell me. I haven’t gotten obsessive with it so I don’t know where the outer limits are. 😀
I’d imagine you could tumble them until you get to the point that when you squeeze the trigger it sounds like a fart and back off from there. When I’ve “needed” to tumble loaded brass I tumble for several hours and that accomplishes my goal.
How long do you need to tumble your brass for?