.358 Win. Load Data & Reloading Guide

The .358 Winchester was introduced by Winchester in 1955, based on the .308 Winchester case, necked up to accept a .35 caliber bullet. It was developed to provide improved stopping power and energy transfer over the .308, making it ideal for larger game hunting. Although not as widely popular as some other calibers, it found favor among hunters seeking a cartridge capable of handling North American game such as elk, moose, and black bear at moderate ranges.

Technically, the .358 Winchester features a bullet diameter of 0.358 inches and a case length of 2.015 inches. It can be loaded to deliver muzzle velocities ranging from approximately 2,200 to 2,800 feet per second, depending on the bullet weight. Typical bullet weights for this caliber vary between 180 and 250 grains, catering to different shooting and hunting needs. Its relatively short case enhances its efficiency, resulting in good barrel life and reduced recoil compared to magnum cartridges of similar caliber.

From a ballistics standpoint, the .358 Winchester offers a strong performance at short to medium ranges. It excels in dense woodland environments where shots are typically taken within 200 yards. The energy and bullet design allow for effective penetration and controlled expansion, making it a reliable choice for dropping large game quickly and humanely.

For reloaders, the .358 Winchester presents several advantages. Its parent case, the .308 Winchester, is widely available and easy to modify, providing a ready supply of brass. Reloading options are versatile, as a wide range of bullet choices exist due to the popularity of .35 caliber projectiles. With careful load development, reloaders can optimize performance for specific rifles and intended uses, allowing for enhanced accuracy and consistent results tailored to individual preferences.