I found a load with 7 grains of Unique at 1560 FPS with a 115 cast. It would be cheap to shoot, if it cycles the action. I already have 2 or 3 pounds of Unique, since that is what I load my 44-40 with for CAS shooting. Also found one with 12 Grains of 2400 gives 1750, and is supposed to cycle excellent. The nice thing about the moly coated Bear Creek Supply bullets is that they don't lead, even without a gas check, at reasonable velocity.
Bear Creek's moly are $60/1,000. I found a source for copper plated bullets that will load to standard velocities for $79/1,000. I might go that way, and just load 14.5 grains of WW296. Should print about the same as R-P factory, at least at plinking ranges.