.300 Norma Magnum

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.[1] 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).

.300 Norma Magnum
Type	Rifle
Place of origin	Sweden
Production history
Designer	Norma
Designed	2012
Specifications
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 cm^3 (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)
Ballistic performance
Bullet mass/type Velocity Energy 220 gr (14 g) MatchKing 3,003 ft/s (915 m/s) 4,404 ft⋅lbf (5,971 J)
Source(s): Cartridges of the World, 2012

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) P_max piezo pressure.[2]

References

1. Barnes, Frank C. (2012). Richard A. Mann (ed.). Cartridges of the World (13th ed.). p. 471. ISBN 1440230595.
2. "C.I.P. TDCC datasheet 300 Norma Mag" (PDF). CIP. Archived (PDF) from the original on 12 July 2013. Retrieved 4 July 2013.

External links

• https://www.longrangeshootinghandbook.com/socom-chooses-300-norma-mag-asr/
• http://www.wideopenspaces.com/ever-heard-of-the-300-norma-mag-well-its-the-new-socom-sniper-cartridge/
• C.I.P. TDCC datasheet 300 Norma Mag.