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Guys, thank you for this thread! I wasn't aware of the setback problem affecting the .40S&W. After 20 years of carrying 1911s, I bought a .40 M&P last year in preparation of rejoining my SO's reserve program. I haven't shot them, but I know some of my .40 round have been rechambered several times. I'm going to check them out today with a caliper.
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