.500 Jeffery Riml. Load Data & Reloading Guide

The .500 Jeffery Rimless, also known as the .500 Jeffery, is a powerful big game cartridge originally developed in the early 20th century by August Schuler of Germany. Its design was intended to provide hunters with an effective tool for the most formidable game in Africa. The cartridge gained recognition for its substantial stopping power, making it particularly popular during the golden era of African safari hunting. Originally known as the .500 Schuler, it was later adopted and renamed by Jeffery in the United Kingdom, further cementing its reputation among hunters and explorers of the period.

In terms of technical characteristics, the .500 Jeffery employs a rimless bottleneck case design, with a large base diameter and a robust powder capacity. The rimless design facilitates smooth feeding in bolt-action rifles, which are often the choice for dangerous game hunting. The case length measures approximately 2.75 inches, supporting substantial bullet weights typically in the range of 535 to 600 grains. These heavy bullets are capable of achieving muzzle velocities of around 2,150 feet per second, resulting in significant kinetic energy and formidable penetration capabilities.

Ballistically, the .500 Jeffery is designed for short-range engagements typical of big game hunting where maximum stopping power is required within 100 to 200 yards. The combination of high energy and heavy bullet mass delivers deep penetration and reliable expansion, ensuring lethal impacts on even the largest and most dangerous game species. Despite its prowess at short distances, the cartridge is not optimized for long-range precision, as its trajectory drops significantly beyond typical engagement ranges.

For reloaders, the .500 Jeffery provides several advantages. Its large cartridge case allows for a variety of powder types to be tested for optimal performance, giving experienced reloaders the opportunity to fine-tune loads for specific shooting conditions and personal preferences. Additionally, given the high cost of factory ammunition, reloading can significantly reduce shooting expenses, allowing more practice and proficiency with the caliber. Reloaders must be cautious, however, of the significant recoil generated by the cartridge and ensure all components, particularly primers and powders, are suitable for the high pressures encountered with this formidable round.