I don't know much about it. I looked at the Wikipedia entry on it, and the examples it uses for ballistics have 60, 65, and 73 grain bullets doing anywhere from 925 to 1100 feet/sec, but when I look at the published load data, most is below that, in the 600-900 range, except for Alliant, which has the 60 grain GDHP doing from 970 to 1030. Oddly, Alliant has Bullseye and Power Pistol with the same max velocity, though Power Pistol takes about 40% more powder to get there.