If you want an easier shoot with your current set-up, buy a .40 S&W barrel as it should be a drop-in. The .40 shoots very easily, is the same length as you .357 Sig and same case base diameter (as the .357 Sig is only a necked down .40 S&W). I am not certain, but your existing mags may work with .40, just don't quote me on that untilk you try as the feed lips on the mag may not care for the .40's wider case mouth.
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