Cleaning Bullets?

[Pistole+Parabellum]

I found couple other techniques discussed:

Lemi Shine (from Wallyworld). It's a detergent used in dishwashers. It will make them look like brand new

Tumbling will not hurt the bullets at all. They are simply sliding around in a nice soft corncob mix. What could possibly hurt them? I polish bullets like this all the time. Put a little Nufinish polish in with them and they'll look like new in about 30 minutes.