.350 Mag. Rigby Load Data

The .350 Magnum Rigby is a classic British rifle cartridge introduced by John Rigby & Co. in 1908, during the heyday of British sporting rifle development. Designed as part of the transition from big-bore black powder cartridges to high-velocity smokeless powder rounds, the .350 Mag. Rigby was based on the 400/350 Nitro Express case and reflects the innovations of its time. Its creation coincided with a surge in African and Indian safari hunting, where reliable medium-bore rifles were in high demand. The cartridge quickly established a reputation for accuracy and dependable performance among British hunters and professional ivory hunters, as well as in colonial police and governmental agencies across various territories.

The .350 Mag. Rigby was crafted as a versatile medium-bore rifle cartridge for use in bolt-action rifles, targeting both dangerous and non-dangerous game. Its design allowed it to deliver a flat trajectory and sufficient stopping power for British field conditions in Africa and India, filling the gap between lighter small bores and the more unwieldy big bores. Ammunition reloaders today appreciate the .350 Rigby Magnum for its balance of power, manageable recoil, and the historical prestige associated with the Rigby name. The cartridge remains favored in classic sporter rifle builds, seeing intermittent revivals among bespoke gunmakers and custom ammunition loaders.

In practical application, the .350 Magnum Rigby has historically excelled on large medium game and dangerous species such as lion, leopard, and even buffalo, particularly in regions where legal minimums for dangerous game are below the .375 caliber threshold. Its moderate recoil has made it a practical option for repeated firing in extended hunting scenarios, while its well-engineered case design ensures reliable cycling in bolt-action rifles—essential for quick follow-up shots. On the plains of Africa and in the jungles of India, the .350 Rigby proved itself against antelope, wild boar, buffalo, and even tigers, making it a preferred tool for colonial-era game rangers and sportsmen.

The typical bullet weights for the .350 Mag. Rigby range from 225 to 250 grains, traditionally loaded with full metal jacket or soft-point bullets to balance penetration and expansion. These bullet weights, coupled with velocities often around 2,500 to 2,700 feet per second, provide excellent ballistic performance and penetration on medium to large game. Ammunition reloaders note the moderate case taper and robust rimless bottleneck design, which contribute to smooth feeding and extraction in Mauser-pattern actions. The cartridge’s case capacity permits flexible handloading, allowing reloaders to tailor their ammunition for specific applications while maintaining safe pressure levels. Owing to its combination of nostalgia, hunting efficacy, and handloading potential, the .350 Magnum Rigby continues to hold a modest following among dedicated reloaders and classic rifle enthusiasts.