I'm going to lay some cards on the table here... Please don't hate me...
When I was shooting at the indoor range, I didn't even bother tumbling practice brass before loading. I'd just shake it out, inspect for berdan/plugged holes, then spray it down with lube and get to loading. I waited about ~30 seconds before chucking the first batch into the collator. I don't understand what all the fascination is with shiny/clean brass.
Hornady OneShot case lube is life when you've got automation... It is inert, doesn't really stick to powders, ensures that things move smoothly through the dies.
(Also Hornady OneShot dry lube and cleaner is amazing - you can see it on the bench)
http://instagram.com/p/Bj7XWBbnDZ0/