.338 Marlin Express Load Data & Reloading Guide

The .338 Marlin Express was introduced by Marlin Firearms in collaboration with Hornady in 2009. It was developed to enhance the capabilities of lever-action rifles, offering a powerful yet manageable cartridge option. While it follows in the footsteps of the .308 Marlin Express, the .338 variant provides a larger bullet diameter, aimed at hunters looking for hard-hitting, medium-to-large game performance.

Technically, the .338 Marlin Express is centerfire with a rimmed bottleneck case designed for lever-action rifles with tube magazines. Commonly featuring a case length of 2.015 inches and an overall length of 2.565 inches, it operates at a maximum average pressure of 46,000 psi. The use of Hornady's Flex Tip (FTX) bullets improves its ballistic coefficient and expands its range and accuracy potential.

From a ballistic standpoint, the .338 Marlin Express provides significant stopping power and effective range. Typical bullet weights range from 180 to 250 grains, with a 200-grain loading being popular for its balance of velocity and energy. This caliber achieves muzzle velocities in the range of 2,565 feet per second, offering a flat trajectory suitable for hunting deer, elk, and moose at moderate distances.

For reloaders, the .338 Marlin Express offers several advantages. The availability of versatile bullet weights allows for customization based on specific hunting or shooting scenarios. Additionally, the strong brass construction of factory cases provides excellent reloadability, ensuring a long case life when following proper resizing techniques. Reloaders can optimize performance by selecting appropriate powders and primers to tailor loads that best suit their rifles and shooting needs.