Power Pistol is Best choice for high performance 9mm, .40 S&W and 10mm.
Power pistol is the worst !
(At least that is my story until I find more in stock)
I've read cautions about faster burn rate powders with 40 (bullseye for example) so now I'm inclined to use powders in the Power Pistol/Unique/etc. burn rate range. Based on performance I was very happy with Bullseye until I got a little paranoid.