+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.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."