I'm shooting my M&P40 with both 165 and 180 grain Ranier copper plated bullets over 5.4 gr Accurate #5 -- a relatively low power load that cycles the gun without fault. I do not have a chrono but estimate the recoil to be about the same as my M&P9 with standard 124 grain JHP loads. In short, one of the benefits of hand-loading is down-loading, saving some money and getting some easy time on the .40.
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