I have heard from a few different shooters that you don't really want to get the cass too polished,it can actually cause accuracy problems.David Tubb recomends only tumbling about every 4th firing,or whenever they get excessivley dirty,he said mainly just focus on keeping the primer pockets and necks clean.That's why I just use a rag dampened with Sea Foam(carbon remover) and wipe off the carbon around the outside neck and shoulder area,then brush out the primer pocket and inside neck.My cases won't win any beauty contests,but it works for me.