I've never had "dings" from tumbling brass. I use a Dillon CV500 tumbler. If you don't overload the tumbler you should have no problems, besides, I tumble my brass BEFORE I size it. This eliminates transferring carbon and crud to the inside of my die, as well as making the sizing operation easier. After sizing I tumble it again for a shorter time to clean the lube from the cases. One thiing you do not want is lube on a case, either outside or inside. On the outside it will transfer to the chamber walls of your firearm and cause problems with FTF and FTE. On the inside it can react with powder/primer.
Guns Have Only Two Enemies-Rust and Politicians
"The United States Constitution (c) 1791 - All Rights Reserved"
If Guns Kill, Do Pencils Mis-spell Words?
Pain is Weakness Leaving the Body - USMC
"Qui desiderat pacem, praeparet bellum"
Last edited by RL357Mag; 03-29-2009 at 08:01 PM.