I researched these numbers real quick on the web for another post. Data from Remington, CCI-Speer, Winchester, Federal.
9mm splits the difference between .38 +P and .357
.38 Spec +P 125gr 950fps
9mm 125gr 1100fps
.357 125gr 1300-1500fps
I sought out a used, 3" SP-101 in 9mm for an old girlfriend who wanted a pistol. I figured the combination of revolver for simplicity, 9mm for stopping power, and full-moon clip for even simpler reloading would be a winner. Plus it was $265. She wasn't strong enough to rack the slide on most automatics, but could pull the DA trigger with one finger, with enough accuracy for "Get out of my bedroom" work. Pull the trigger 5 times, reload.
The 3" was snappy with 115gr. ball and a riot with some imported 147gr. +P FMJ from IMI, IIRC. I didn't have her fire that, I was just checking the recoil. The factory stocks are brutal, BTW.
We found the Hogue 3-finger grip to be nearly perfect, and slim.
I've kept an eye out for a six-shot Ruger in 9mm, but I'd rather some one make a five-shot .45 on a frame that size-- but not Taurus.