.358 Norma Mag. Load Data & Reloading Guide

The .358 Norma Magnum was introduced in the late 1950s by the Swedish company, Norma. Developed as a powerful option for medium and large game hunting, it bridges the gap between the .338 and .375 calibers, offering a good balance of power and recoil. It was designed partly to rival the .338 Winchester Magnum but with unique characteristics that set it apart.

Technically, the .358 Norma Magnum features a case length of 2.520 inches with a slightly rebated rim, providing additional case capacity over its competitors. This increased capacity allows for larger powder charges, resulting in higher velocities. The typical bullet diameter is .358 inches, and it is well-known for its excellent accuracy due to its efficient case design and balanced load distribution.

Ballistically, the .358 Norma Magnum excels with high energy delivery and flat trajectory, making it suitable for long-range shots. It commonly utilizes bullet weights ranging from 200 to 300 grains, with 250 grains being particularly popular for hunting applications. The cartridge delivers velocities over 2700 feet per second with heavier bullets, ensuring deep penetration and reliable performance on big game.

For reloaders, the .358 Norma Magnum offers significant benefits due to its flexible loading options. The availability of a wide range of .358 caliber bullets allows for customization in bullet design and weight, which can be optimized for specific hunting conditions or game size. Furthermore, its robust design and construction handle a variety of powder types and loads, providing an ideal platform for both experimentation and precision tuning.