.400/350 Rigby N.E. Load Data & Reloading Guide

The .400/350 Rigby N.E. was introduced by John Rigby & Co. in the early 20th century, primarily intended for big game hunting in Africa and India. This caliber is part of the Nitro Express series, utilizing smokeless powder for increased velocity and energy compared to its black powder predecessors. Designed for use in double rifles, it catered to hunters seeking reliable stopping power with moderate recoil.

Technically, the .400/350 Rigby N.E. features a rimmed, bottlenecked cartridge case, giving it smooth chambering in break-action rifles. The case length is approximately 2.75 inches, with a bullet diameter of about .358 inches. This configuration allows for efficient powder burn and reliable extraction after firing. Standard factory loads offer bullet weights in the range of 310 to 400 grains. The cartridge typically delivers a muzzle velocity between 2150 and 2200 feet per second, with corresponding muzzle energy suitable for medium to large game.

Ballistically, the .400/350 Rigby offers a manageable recoil compared to larger Nitro Express cartridges while maintaining effective energy transfer for hunting dangerous and plains game. Its trajectory and energy make it a well-rounded choice for shots within typical safari engagement distances, with adequate penetration and expansion.

For reloaders, the advantages include the ability to tailor loads to specific game or preferences, optimizing performance within the safe pressure limits of vintage rifles. Despite being an older cartridge, components such as cases, bullets, and dies are available through specialty suppliers, allowing for continued use of classic hunting rifles. Reloading this caliber provides enthusiasts with the chance to recreate historically accurate loads or develop customized combinations conducive to their specific hunting conditions.