9mm bullets, 115 or 124gr??

kcofohio said:

It seems that about 115 gr., taking in consideration of grams to grains conversion, what was common. I haven't found an actual writing of the original weight by Luger.
NATO, per Wikipedia, list standard bullet weight between 108 gr. to 128 gr.

Click to expand...

FWIW

Before the NATO Standard the weight was 115 gr. From the same Wiki Article.

https://en.wikipedia.org/wiki/9×19mm_Parabellum

Commonwealth standard
The Cartridge S.A. Ball 9 m/m Mark Iz (9 m/m BALL MK 1z) was the standard Imperial 9mm Parabellum round in World War II and was produced from December 1941 to 1944. It was meant for use in semiautomatic pistols like the Inglis Browning Hi-Power. Bullet weight was 115 grains (7.5 g). Velocity was 1,200 feet per second (370 m/s) at 20 yards (18 m). It is noted by its purple annulus around a standard gold-colored primer.

The higher-powered Cartridge S.A. Ball 9 m/m Mark IIz (9m/m Ball MK 2z) was in production from September 1943 until 1988, and was graded as NATO standard in 1962. It was designed for use in submachine guns such as the Lanchester, Sten, and Sterling. Bullet weight is 115 grains (7.5 g) over a charge of 6 grains (0.39 g) of Du Pont SR.4898 or Dynamit-Nobel Parabellum Powder. Velocity is 1,300 feet per second (400 m/s) at 20 yards (18 m). It can be distinguished from the 9-mm Ball MK 1z by its purple annulus around a silver primer.

India and Pakistan manufactured 9mm Parabellum ammunition to this standard after independence.

Canada's Cartridge S.A. Ball 9 m/m CDN Mark I (9-mm Ball CDN MK 1), made since 1955, has similar ballistics. Bullet weight is 115 grains (7.5 g). Nominal muzzle velocity is 1,246.7 feet per second (380.0 m/s).

NATO standard
The 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 "9 mm NATO".[9] Standard bullet weight is 7.0 grams (108 gr) to 8.3 grams (128 gr).

9mm NATO can be considered an overpressure variant of the 9×19mm Parabellum that is defined by NATO standards.[26] The service pressure Pmax of the 9mm NATO 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.[27] Declaration III does not apply in conflicts involving nonsignatories to the Hague Convention, including paramilitary and other nongovernmental fighting forces.[28]