The rimless 9x23mm version of the 38 super is what I shoot.
16 gr Power Pistol, 158 gr XTP is the load.
1.35" in a Tokarev.
1.3" in a Star Super B.

This is a double charge for a 357 mag, and shorter OAL, so this this load really rocks.

www.alliantpowder.com with B-dot and also Powder pistol is very accurate and clean. www.hodgdon.com with HS-6 is also good