I use the .311 100 grain Lee mold, lubed with Lee Liquid alox. Start at 3.0 grains red dot, then work up. I use .32 H&R, 9mm, and old .38 ACP (Not Super) data to extrapolate. Lee 2nd edition very useful. I hesitate giving out more, as I do not know how good your springs are. I also use Tokarev cases. I also have .30 Mauser cases, but I trim them to same length, as I also use these loads in my Tokarevs and my PPS. I do consider the Tok and Mauser cases interchangeable. (both PPU) Mauser supposedly a frog hair longer, but seems within normal variation under my calipers.
I also have loads using the Speer 100 grain half jacket "Plinker" bullet, over CFE pistol powder, but these are completely speculative on my part.