I have a bunch of primed (live primed) brass for my 338 RUM that hasn't been tumbled. I recently threw in the towel and ordered myself a tumbler, so I'd like to tumble them now. Is there a safety issue here? Please don't laugh if this is a big no-no!
One major problem with tumbling primed brass is that the tumbling medium can get lodged in the flash hole. This will severly hinder the performance of your loads. This is a minor nuisance for unprimed shells and I would expect the same problem to occur with a primer in place.
What's a bunch? Is it like a gaggle? or a flock? Maybe a herd? LOL
Why don't you get the Lee case length guage with shell holder and the cutter and lock stud so you can spin them in a battery drill and use #OOOO steel wool to clean them?