Glock advises that you use the proper caliber that correlates with your particular Glock model and to avoid reloaded ammunition. While reloaded ammo is safe to use in Glocks, using this type of ammo will void your warranty on the firearm. Because there is no quality control on reloaded ammo, Glock cannot guarantee it will not damage or hurt your pistol.
Can a Glock shoot plus P ammo?
Some +P ammunition meets SAAMI guidelines, but +P+ usually does not. This ammo may generate a higher pressure than standard ammunition, which could shorten the life of the parts of your firearm.
That covers our ammo recommendations for Glock handguns.
The best thing to do with any ammo is test it yourself. So pick up a box and see how it performs at the range.
If you’d like more 9mm ammo recommendations, check out this deep dive into the ballistics of several popular rounds: