Advertised Velocities (no particular order):
Winchester Super-X 175gr STHP @ 1290 FPS
Cor-Bon 135gr JHP @ 1400 FPS
Cor-Bon 150gr JHP @ 1325 FPS
Cor-Bon 165gr JHP @ 1250 FPS
Cor-Bon 180gr JSP @ 1300 FPS
Cor-Bon 200gr Penetrator @ 1150 FPS
Pro-Load 135gr Nosler JHP @ 1440 FPS
Pro-Load 155gr Gold Dot JHP @ 1350 FPS
Pro-Load 180gr Gold Dot JHP @ 1200 FPS
Triton Quik-Shok 155gr @ 1400 FPS
Federal Hi-Shok 155gr JHP @ 1330 FPS
Hornady XTP 155gr JHP @ 1260 FPS
Hornady XTP-Full 180gr JHP @ 1180 FPS
Note that all of these figures are far above anything produced by .40S&W factory loadings. A favorite is the Winchester Super-X 175gr STHP, although it is worth pointing out that the 1290 FPS figure is for a 5.5" test barrel and the actual velocity out of a 4.5" barreld Glock 20 is more like 1200 or so based on chrono results I've seen posted around here. I've personally shot the 175gr Silvertip, 155 & 180gr Pro-Load and 165gr Cor-Bons and all were reliable and accurate.
All available from:
Cor-Bon,
http://www.cor-bon.com
Pro-Load,
http://www.proload.com
Triton,
http://www.triton-ammo.com
Hornady,
http://www.hornady.com
Everythihng else,
http://www.cheaperthandirt.com
As for 10mm firearms, of those currently manufactured the Glocks are the best by far. My 20C is very accurate and completely reliable. The EAA Witness 10mm is a good gun too, and a steal at ~$300, but is just OK in the accuracy department. It was a very soft recoiling gun, however. I sold it to a friend and he is very happy with it. The porting on the Glock 20C does a great job of reducing muzzle flip and felt recoil, too... and Glock has a factory drop-in 6" hunting barrel that has worked really well, too.
C.B.