I tried the Lewis lead remover and found it to work ok, but felt like it was more trouble than it was worth. I use the stainless steel bore brushes that they sell at gun shows. I found them to work better than anything else. Pick a brush that fits your bore without being too tight and just run it back and forth. The lead will just flake out. Use a slightly larger brush to clean the forcing cone and chambers. These brushes are stiffer than bronze but a mild steel much softer than barrel steel.

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Billy
Gunsmith, M/C mechanic