[HankL]

JW, you can search here for what has been said about tumbling live rounds. That said, I do it. The spray lubes as mentioned above do not take long to come off in your media of choice.

The only real problem that I see with tumbling live rounds is with changing the burning rate of the powder by wearing the coatings off the powder. I use a bulk powder that I have proven to myself that does not change it's burning rate after a very short time in the tumbler.

Boat Tails just make the entire job easier and quicker. Better on your fingers as well.