.358 Norma Mag. Load Data

The .358 Norma Magnum has a rich history rooted in mid-20th-century innovation by the Swedish ammunition manufacturer Norma. Designed by Nils Kvale and introduced in 1959, the cartridge was Norma’s ambitious answer to the demand for a hard-hitting medium bore that could fit into standard-length rifle actions. It was not patterned after any military round but was instead a necked-up version of the .308 Norma Magnum, itself based on the .300 H&H Magnum’s case. The intent was to combine powerful performance with efficient case design, providing a cartridge suitable for large North American game without requiring the extra-long actions associated with traditional magnums of the era.

In terms of application, the .358 Norma Magnum stands as an exceptional cartridge for hunters seeking to take down large and dangerous game. Its power and versatility make it popular for pursuits ranging from moose and elk to bear and even African plains game, where regulations permit. The cartridge’s design yields a high velocity and significant energy transfer, especially suitable for dense brush or woodland hunting where quick, decisive stopping power is vital. For reloaders, the .358 Norma Magnum offers a balance between manageable recoil and magnum-level performance, lending itself well to custom load development tailored to specific hunting scenarios.

Target species for the .358 Norma Magnum notably include all the largest North American big game, such as moose, elk, black bear, and brown bear. Its powerful ballistics make it particularly favorable in hunting scenarios where shots may need to be taken at various ranges, from close quarters in thick cover to extended distances across open terrain. The bullet’s high sectional density and wide range of available weights further enhance its suitability for ethically harvesting tough, heavy-bodied animals—ensuring deep penetration and controlled expansion upon impact.

Typical bullet weights for the .358 Norma Magnum generally span from 200 to 300 grains, with the most common choices for big game hunters being in the 225 to 250-grain range. These weight options provide a good spectrum of ballistic performance and terminal effects. Lighter bullets are valued for flatter trajectory and higher velocities, while heavier bullets maximize penetration and energy transfer for large game. The caliber features a rebated rim and ample case capacity, promoting efficient powder burn and consistent velocities. With its .358-inch bullet diameter and balanced case dimensions, the .358 Norma Magnum offers reloaders ample flexibility for tuning loads to individual preference and hunting requirements. Ongoing popularity among experienced reloaders is driven by its unique blend of power, accuracy, and practical versatility.