3.8 C.D in 9mm with 115 HAP jhp in a S.A. 1911 does 1080 fps, accurate @ 50 yds.
Use Clays data in .45 acp, start low end. I use 3.4 for 200 swc.
I've shot great revolver scores (ppc) with 2.2/2.5 c.d. And 148 gr hbwc.
Look around for clays data, your in good shape..