.310 Cadet Rifle Load Data & Reloading Guide

The .310 Cadet Rifle cartridge, developed in the late 19th century, was originally designed for training young cadets in Australia and the United Kingdom. Also known as the .310 Greener, it was specifically used in the Martini Cadet rifles. This cartridge represents the classic era of small-bore target practice and military training, functioning within single-shot, lever-action rifles.

Technically, the .310 Cadet has a nominal bullet diameter of .316 inches and a case length of approximately 1.08 inches. Its rimmed, straight-walled design makes it compatible with single-shot rifles, which dominated its use. Reloaders often find this cartridge intriguing due to its unique characteristics, including using a heeled bullet, similar to that used in the .22 rimfire, which requires careful consideration during the reloading process.

The ballistic performance of the .310 Cadet is modest compared to modern standards, with velocities typically ranging around 1200-1400 feet per second. Original loads featured a 120-grain lead bullet, which is effective at short ranges, making it suitable for small game hunting and target practice. The cartridge’s low recoil and mild report also make it ideal for beginner shooters.

For reloaders, the .310 Cadet offers a historically significant challenge and reward. The cartridge's obsolescence means commercial ammunition is scarce, prompting reloaders to create custom loads using available components. The reloading process involves crafting heeled bullets and forming compatible cases, which can be sourced from .32-20 brass. This level of involvement is particularly appealing to enthusiasts interested in vintage arms, allowing them to breathe new life into classic firearms while appreciating the history and functionality of a bygone era.