WSF gives good velocities and accuracy with 115gr and 124gr jacketed and plated bullets in 9mm. 5.3gr WSF under a Montana Gold 115gr FMJ is one of my favorite loads for my CZ 85C. (According to the Winchester [Hodgdon] Lloading manual, this is about 28,000 psi.) It averages around 1,130 fps with extreme spreads of about 40 fps. The max load is 5.7gr.vwith 115gr FMJ.
Other folks say they have had good accuracy with WSF and 147gr bullets, but I've never tried the combination myself.
For 124gr FMJ, I use 4.9gr WSF for about 1,060 fps.
Reduce these loads by .3 gr when using plated bullets.
I load all my 9mm at just slightly shorter than the maximum length that will feed reliably without contacting the lands. Shortening OAL will dramatically increase pressure.
Chris