The 9mm cartridge has been manufactured by, or for, more than 70 different countries and has become a standard pistol caliber for NATO and other military forces around the world. Its official nomenclature among NATO members is "NATO 9mm".[22] Standard bullet weight is 7.0 grams (108 gr) to 8.3 grams (128 gr).
NATO 9mm can be considered an overpressure variant of the 9×19mm Parabellum that is defined by NATO standards.[23] The service pressure Pmax of the NATO 9mm is rated at 252 MPa (36,500 psi) where CIP rates the 9mm Luger Pmax somewhat lower at 235 MPa (34,100 psi). The 315 MPa (45,700 psi) proofing test pressure used in the NATO 9mm proof test, however, equals the proofing test pressure used in the 9mm Luger CIP proof test.
While the NATO standards do not specify the type of bullet to be used, Declaration III of the Hague Convention of 1899 prohibits the use of expanding ammunition in warfare by signatories, so official NATO 9mm ammunition is FMJ "ball" bullets.[24] Declaration III does not apply in conflicts involving nonsignatories to the Hague Convention, including paramilitary and other nongovernmental fighting forces.[25]