The federal hydra shoks aren't that slow actually and are quite effective.
I like Hydra Shok's but they're too slow in the 40S&W, IMO.
Federal Hyda shoks 155 gain FPS 1140/ FPE 447 isn't that bad overall. Average penetration is 12 inches.
It's the top rated one stop round right now for self defense handguns. I admit I don't believe in the one stop theory totally, but the real world numbers on the .40 S&W federal 155 grain hydra shok JHP for the .40 S&W have been impression.
The Top Ten One Shot Stop loads for Handguns.
Rounds/percentage of one shot stop ( Actual Shootings)
Federal .40 155 grain Hydra-Shok /97
Federal .357 Magnum 125 grain JHP /96
Federal .45 ACP 230 grain Hydra-Shok /96
Remington .45 ACP 185 grain Golden Sabre +P /95
Federal 9MM 115 grain JHP +P+ 9BPLE /93
Triton & Corbon .40 135 grain JHP /92
Winchester .44 Magnum 210 grain Silvertip /91
Triton .357 Sig 125 grain Rainer JHP /91
Winchester .41 Magnum 175 grain Silvertip /90
Federal .40 180 grain Hydra-Shok /90