I use Power Pistol for 9mm in my 940 and for .45 ACP in my 625s. It's the best high velocity powder I have found yet for these two cartridges, when used in revolvers.

I have not tried it in the .40 S&W and probably never will. The only .40 I own is a Glock 35 with the factory barrel and it will shoot the factory loaded Speer 180 gr. FMJFP at 1080 FPS. I don't think I can ask for more from this gun/cartridge combo and won't press my luck.

Dave Sinko