So I have a small batch of 44-40 that I threw in the tumbler yesterday with new Cobb media. Remembered the tumbler was running 27hours later and ran out to shut the tumbler down and pull the brass and the Cobb turned to cat litter. I don’t think the brass was that dirty, maybe over cooked it? Last I can recall using it I got 2 or 3 runs out of a tumbler of media.
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