.300 Norma Magnum

.300 Norma Magnum
TypeRifle
Place of originSweden
Production history
DesignerNorma
Designed2012
Specifications
Parent case.338 Norma Magnum
Case typeRimless, bottleneck
Bullet diameter7.83 mm (0.308 in)
Neck diameter8.68 mm (0.342 in)
Shoulder diameter14.29 mm (0.563 in)
Base diameter14.87 mm (0.585 in)
Rim diameter14.93 mm (0.588 in)
Rim thickness1.52 mm (0.060 in)
Case length63.30 mm (2.492 in)
Overall length93.50 mm (3.681 in)
Case capacity6.75 cm3 (104.2 gr H2O)
Rifling twist229 mm (1 in 9 in)
Primer typeLarge 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

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. According to the official C.I.P. (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]

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  3. ^ Cite error: The named reference mk22 asr was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference xm1163 nsn was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference m1163 designation was invoked but never defined (see the help page).