Checking my reloading log
a 165 gr Gold Dot with 7.7 gr AA#5 gets 1017 fps average from my G22 for 379 ft lb.
5.6 gr Unique worked well, not chronographed. 5.3 gr also worked fine.
5.0 gr 231 averaged 928 fps with a Nosler 170 gr JHP for 325 ft lb.
With a Hornady 180 gr JHP and 5.0 gr 231, I got 933 fps and 348 ft lb.
I suspect that if you want to get max safe FPS you may want other powders. I have some Speer factory loads, 165 gr Gold Dots, which rock: they average 1132 fps for 469 ft. lb., which approached .357 magnum revolver loads. That's what I carry now, because I'm reluctant to push my handloads that far in this cartridge.
My standard practice load is a Rainier 165 gr bullet and 7.7 gr AA#5, which has recoil much like the Speer factory loads.