Dont remember the brand but I got self defense HP's in my ppks. I figure that if I have to shoot, more than likely it will be between 0 and 15 feet, so with 2 magizines of 7rds each I will stop the threat. More often now though I carry my Sig P226 9mm with Winchester HP's same thing 0 -15 feet. I guess I just dont understand researching every single round. The rounds I have in my 9mm are the same thing we carry for the dept, but in .40. Good enought for the state good enought for me. As long as it stops the threat thats all I care about.
Found this on Wikipedia http://en.wikipedia.org/wiki/Stopping_power