OK...found my data.
A load I've tried several times over the last 15+ years is 8.6 grs. of Blue Dot under a cast 255 gr. SWC. Velocities ran from 927 fps to 956 fps out of my Colt Gov't Model. I got this load out of a magazine called simply "45 Auto", 30+ years ago. It's a heavy, but accurate load, so work up to it.
In my two S&W 1917's I loaded some 286 gr. cast SWC's. Loaded over 6.0 grs of Unique, velocity was 860 fps out of one, and 872 fps out of another, and accuracy was excellent out of both revolvers. 8.5 grs. of Blue Dot and the same bullet netted 867 fps.
Lately I've loaded some cast 255 gr. SWC's over 6.5 grs. of Power Pistol which run 905 fps.
Hope this helps.
35W