I thought of that, but man........six hours?

In about 10 years of (smokeless powder) handgun shooting and reloading I just remember putting around 150 - 200 cases in my tumbler, a little paint thinner, and running it for 2 hours MAX.

Something just doesn't seem right to me. 6 hours to clean some brass (EIGHT shells!) of blackpowder fouling?

Well, I guess I just have to accept it as fact until trying it myself. It just seems so......extreme.