I'm fairly new to the Glock and have only put 400 rds. total through my 26 and 19. Now I know someone wants to tell me just to goggle this question but, I feel this is what these forums are for to talk among friends with similar interests so. I would like to use my 9mm for PD, I know many will say well you should of picked a different caliber to start with but this is what I have and I plan to depend on it to God forbid save my life. I know 115gr. gives better penetration due to velocity and 124gr. and 147gr. makes bigger holes, but I like to know from you folks who have had to use your weapon to protect you and your family from harm, what is your experience and therefore the best overall round to carry if I should ever need to use my weapon. Thanks Wanna kill these ads? We can help!