+P and +P+ are higher pressure and higher velocity.
Glocks will shoot these forever. I run nothing but +P+ factory and reloads in my Glock and my SIGs.
My G-17 has digested over 12000 +p and +P+ and shows no signs of wear.
Awesome. Cheaperthandirt.net has some pretty cheap so I didn't know if I should pick it up or not. Thanks for the words of wisdom everyone.
Nate from WV, live in NC