I do know that Glock did not like that their guns should shoot a lot of the INS load in G23's. the old INS load was a 155 JHP at 1250 FPS, while not +P designated it is hot. The 9mm Glocks are designed for 9mm NATO, which is similar pressure to +P 9mm. I hope that is not confusing...
My rifle and pistol are tools, I am the weapon.