I have seen this "discussion" on reloading forums since I started watching in 2009. You are never gonna get a consensus and some get pretty emotional about the subject. You will see all the opinions from "I do it and it's safe because..." to "No never! you'll put your eye out!..." and many examples to back up each argument. Good luck...

If you wanna, go ahead, I've never heard/read about anybody dying as a result of tumbling live ammo, nor any ruined guns. I don't because my reloads aren't dirty...