.338-06 A-Square Load Data & Reloading Guide

The .338-06 A-Square originated in the 1960s, developed as a wildcat cartridge to offer increased power for large game hunting compared to the .30-06 Springfield. Its commercial recognition came when A-Square standardized it, resulting in SAAMI approval in 1998. This cartridge combines the .30-06 Springfield case necked up to accept .338 caliber bullets, enhancing its versatility and terminal performance in the field. It is particularly popular among reloaders who appreciate custom tailoring ammunition for specific hunting needs.

Technically, the .338-06 provides a compelling balance of velocity and energy. It typically features bullet weights ranging from 180 to 250 grains, with 225-grain bullets being the most common for hunting applications. Muzzle velocities generally fall between 2500 and 2800 feet per second, depending on powder type and charge weight. This results in a significant ballistic advantage in terms of range and stopping power, making it suitable for medium to large game, including elk and moose.

Practical applications for the .338-06 primarily center on hunting. Its manageable recoil compared to larger magnum cartridges makes it accessible for a broader range of shooters. The cartridge’s effective terminal performance positions it as an excellent choice for hunters requiring a higher caliber for diverse environments and conditions. The .338-06 can achieve sufficient energy and penetration for ethical harvesting of large game at extended ranges.

For the reloader, the .338-06 A-Square offers numerous advantages. Brass cases are readily formed from the ubiquitous .30-06 Springfield, ensuring consistent supply. Its design allows reloaders to experiment with a wide range of powder combinations to optimize performance for specific firearms. The flexibility in bullet selection empowers enthusiasts to fine-tune loads for different hunting scenarios, maximizing the caliber’s potential and extending its versatility in various applications.