Originally Posted by Bayou
Interesting. I also tumble for 4 hours per batch, and I'm using the Thumler's high-speed model B.
That is interesting.....here are my conclusions.
1. The high speed is irrelevant.
2. Perhaps you are tumbling more than necesary
3. The proper mix of steel, brass and water is more important than speed.
I have tried shorter tumbler times, but never happy with the results.