Started my first run of .223 brass in my rock tumbler.. It's a small tumbler so it's a small run. 100 rounds with 2lbs of stainless media, a 1/2 teaspoon of liquid detergent and 1/2 teaspoon of lemi-shine. Hoping for good things. I already had the tumbler so my total investment is the cost of the stainless media thus far. Will post update when done. Hoping I need the shades on my eyes when done. Anybody with any experience here please post it.