Originally Posted by dkf
I guess it all depends what gun you want to shoot them in. I would just throw the bad ones in the tumbler to knock the loose corrosion off and done with it. Personal preference I guess. I would bet those rounds have been bounced around plenty in their life. If anyone can break it a shipping company can.
I say again that tumbling the live rounds will very likely break apart the propellant granules and thereby greatly increase the pressure. If you must clean the brass, just use Brasso and a rag on each one.