Years ago I used to load Speer 158 gr. lead roundnosed bullets in 9mm cases, for use in my wartime Walther P-38.
They functioned fine, and accuracy was good; better than standard .355 bullets because the darned Walther has a .359 inch bore! That's what prompted me to load .358 diameter lead bullets in the first place.
I believe I used Unique powder, or perhaps Bullseye. Haven't assembled loads like that since about 1975, and back then I wasn't keeping records.
They functioned fine. No idea what the velocity was; back then, chronographs were clumsy, expensive gizmos that required a solid background in math.
I'm mathematically challenged and grumble-enhanced.