thedude said:
I though +P+ was sub-machine gun ammo?
welllll kinda.... In europe,
9mm SMG ammo has been historically loaded hotter. Open-bolt SMGs can handle the extra pressure more easily than a 9mm semi-auto handgun due to the fact that they counter the pressure with heavily weighted & sprung unlocked bolts travelling a much longer distance rather than the much lighter slides of a semiauto that require a locked breech to hold them closed until the pressure peak has passed.
However, the euros have never used the designations +P or +P+ for their ammo (at least until VERY recently) - they simply mark the ammo box "for submachine gun/machine pistol only". Plus, they have historically loaded very little 45acp ammo, much less any overpressure loads. I've never heard of ANY usage of +P/+P+
45acp ammo in SMGs.