I can't believe nobody mentioned to the guy 1) don't tumble rifle brass, 2) certainly don't tumble it 8 hours, and 3) don't lube, resize, and deprime the brass before you tumble.
1) banging the cases together while tumbling increases the hardness of case necks and can cause the necks to split prematurley
2) 8 hours? are there any cases left when you open up the tumbler?
3) if you're having problems with lube clogging media, don't put lubed cases in the media . . . problem solved. Plus, depriming then tumbling, now you have to check every flash hole to make sure it's not obstructed. And, though minute I'm sure, I would think you would eventually enlarge the primer pocket. Out of the gun, into the tumbler, then resize, etc.
BTW, I have cleaned media in water and detergent before. It worked. In fact I liked the media better after the water bucket with detergent method. Still not worth the time and hassle.