Historical past of 9mm Ammo Regardless of whether you call it the 9mm Luger, 9mm Parabellum, 9mm NATO, nine millimeter, or perhaps basic 9mm, 9x19mm ammunition is the most well-liked cartridge for handguns on earth – with a lot more than sixty% of the whole world's legislation enforcement agencies presently making use of this ammo. The role of 9m