Even a constant diet of thousands of rounds a year of 9mm+P ammo in a Glock or Beretta 92 should be fine!!!
You MIGHT run into slight problems with a constant diet of 9mm+P+, but only after a couple thousand rounds or so!!
By slight problem I mean jamming and accuracy problems.
Based on my experience with the department I retired from and using Beretta's, S&W and Glock 9mms' in good working order and recent manufacture!
The main issue is to make sure the selected rounds feed OK and you shoot them accurately.
Land of the Free Because of the Brave!
It is easier to be critical than correct and most people tend to take the easy way!
Last edited by Trigger Finger; 01-21-2013 at 14:16..