I haven't chronographed them, but Quickload sez they are running about 1200 fps from a 4" barrel or almost 1300 from a 6". (by switching from Herco to Power Pistol and upping the pressure a little more, I should be able to get over 1450 fps from a 6" and 1650+ from a carbine)
I honestly haven't done much with them since last fall. I've been using lots of nice slow wadcutters for indoor bullseye shooting lately.
Added: this is not necessarily a smart path that I'm on. Be careful if you decide to follow .