I have a reloading video by David Tubb,and he recomends not polishing brass.He said you don't want brass too smooth,because it can actually move around inside the chamber and cause accuracy issues,that's why he doesn't tumble cases anymore than necessary.That's why I only clean around the neck/shoulder area,unless there is visible dirt on the rest of the case that needs wiped off.My loaded rounds aren't pretty,just functional.
Agree with that statement---mine are tumbled for about 10 minutes and that is it. Just to remove the One Shot lube.