Midway's LoadMap series list 250 FP's, probably Rainiers, using Bullseye powder, RP 2 1/2, and RP cases. Just for info:
4.3 gr Bullseye---14800 psi---670 fps
4.5----------------15700-------697
4.7----------------16600-------724
4.9----------------17400-------750
They tested in a universal receiver and loaded to the max oal at 1.275" which could be too long for your chamber. Make sure they chamber in your pistol. They listed a little higher load levels but I would stay at or below the 4.9 level. Work up to make sure they are safe using your components.