I put almost 500 170grSWC's (copper washed) thru mine yesterday,> I had a bunch of old IPSC loads for a comp gun to burn up (178pf). No problems at all w/leading, just ran a bore brush thru it when I finished.
I shoot lead through my M&P40. I use 170 gr lead cast bullets. I cast my bullets out of straight wheelweights and they work fine. I use a good quality hard lube and I do not have a smoke problem.
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