2000 fps 9mm, 2300 fps 9x23 Winchester. Such performance can be had with cast bullet reloads, too, but you have to cast with "non-lead" solder (95% tin, 5% antimony) from a plumbing supply store. Then must hollowbase it in a lathe, load them over a scary amount of Bullseye powder. Need strong brass cases and fully supported barrels, too. need the Lee handsizer, because the bullets are too hard to size in a regular luber-sizer machine. use Lee's alox lube.