I carry a S&W M&P 340, 1-7/8 " J-Frame. I load 158 grain with 6.5-7.0 grains of Unique and get 950-990 fps. This is in the high .38+P, low .357 magnum territory. It is about as good as the Speer Short Barrel .357 magnum loads I have tried.
I also carry a S&W 3913 9mm. I use Buffalo Bore 147 grain 9mm +P. I get about 1100 fps from those. I think both of these loadings are pretty equal. I shoot the 3913 more accurately at 10 yards, but the M&P 340 conceals better.
6 of one, half a dozen of the other to my way of thinking.
When the number of people in institutions reaches 51%, we change sides.