|.300 Norma Magnum|
|Place of origin||Sweden|
|Parent case||.338 Norma Magnum|
|Case type||Rimless, bottleneck|
|Bullet diameter||7.83 mm (0.308 in)|
|Neck diameter||8.68 mm (0.342 in)|
|Shoulder diameter||14.29 mm (0.563 in)|
|Base diameter||14.87 mm (0.585 in)|
|Rim diameter||14.93 mm (0.588 in)|
|Rim thickness||1.52 mm (0.060 in)|
|Case length||63.30 mm (2.492 in)|
|Overall length||93.50 mm (3.681 in)|
|Case capacity||6.75 cm3 (104.2 gr H2O)|
|Rifling twist||229 mm (1 in 9 in)|
|Primer type||Large rifle magnum|
|Maximum pressure (CIP)||440.00 MPa (63,817 psi)|
|Source(s): Cartridges of the World, 2012|
The .300 Norma Magnum is a cartridge that has begun to gain popularity in the long range shooting community. The .300 Norma Magnum is a .338 Norma Magnum case necked down to .308 caliber. This cartridge was named .300 Norma Magnum to differentiate it from the .308 Norma Magnum designed in 1960. The United States Special Operations Command (SOCOM) has selected .300 Norma Magnum as their new Advanced Sniper Rifle Cartridge (2016).
According to the official C.I.P. (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.
- C.I.P. TDCC datasheet 300 Norma Mag.
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