I bought a 340 PD, not because it is a 357, but because I wanted the lightest used snub available then. I have not bothered to shoot 357 out of it, but I will soon. Its' plenty snappy with 38 target loads. While the short grip is more concealable, in my opinion it requires much more practice to shoot proficiently. I have not tried a 642/442 in the pocket, so I can't say what the additional 3 or so ounces would feel like. I appreciate the lack of a hammer (rendering your jacket pocket a deadly weapon), the many grip options (as in laser), sight options (as in Big Dog), and holster options.