Guys, I wipe my brass down with a soft cloth before resizing. This cleans the brass and helps to find any small crack or flaw. The I resize, deprime, and tumble. How is a soft brass case gonna imbed a grain of sand into a hard steel die? I have dies that are over 50yo and they're still working fine. Can someone cite me an actual case of dies being damaged? I'm not talking about some clutz that would pick up a piece of brass off of the ground and cram it it a die.
