The .300 Norma Magnum, also known as .300 NM or 300 Norma, is a centerfire magnum rifle cartridge developed by Swedish ammunition manufacturer Norma Precision.
The .300 Norma Magnum uses a .338 Norma Magnum parent case necked down to .30 caliber,[1] named to differentiate it from the older .308 Norma Magnum designed in 1960, and has begun to gain popularity among long-range shooters.
(French: Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) rulings, the .300 Norma Magnum can handle up to 440.00 MPa (63,817 psi) Pmax piezo pressure.
[2] The United States Special Operations Command (USSOCOM) chose the new MK22 Advanced Sniper Rifle, which is chambered in .300 Norma Magnum (designated M1163) as well as .338 Norma Magnum.
[3][4][5] The .300 Norma Magnum chambering is offered in these factory rifles: This ammunition-related article is a stub.