.358 Norma Magnum

.358 Norma Magnum
The .358 Norma Magnum rifle cartridge.
TypeRifle
Place of originSweden
Production history
DesignerNils Kvale
Designed1950's
ManufacturerNorma
Produced1959–present
Specifications
Case typeBelted, bottleneck
Bullet diameter.358 in (9.12 mm)
Neck diameter.388 in (9.85 mm)
Shoulder diameter.490 in (12.45 mm)
Base diameter.513 in (13.03 mm)
Rim diameter.531 in (13.50 mm)
Rim thickness.050 in (1.30 mm)
Case length2.520 in (64 mm)
Overall length3.346 in (85 mm)
Primer typeLarge rifle magnum
Ballistic performance
Bullet mass/type Velocity Energy
250 gr (16 g) Bonded SP 2,756 ft/s (840 m/s) 4,217 ft⋅lbf (5,717 J)

The .358 Norma Magnum is a rifle cartridge introduced in 1959 by Norma. The cartridge is closely related to the .308 Norma Magnum and both cartridges share the same case head dimensions as the .300 H&H Magnum, but have far less body taper, resulting in the same internal capacity in a shorter case. The cartridge case is the longest that will comfortably fit in a standard Mauser action, or any rifle action designed to chamber the .30-06. The .358 NM was the first .35 caliber cartridge commercially developed and sold to the American market since the decline of the .35 Newton in the late 1920s.

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