7.5 x 55 Swiss Load Data & Reloading Guide

The 7.5 x 55 Swiss, also known as the GP11, is a rifle cartridge developed in Switzerland and introduced in 1911 for use in the iconic Schmidt-Rubin series of rifles. It was initially designed by the Swiss military as a standard-issue service cartridge and saw widespread use throughout the 20th century. The 7.5 x 55 Swiss has gained recognition for its precision and reliability, maintaining popularity among collectors and competitive shooters long after its military service.

The technical characteristics of the 7.5 x 55 Swiss include a rimless, bottlenecked case design with a cartridge case length of 55.6 mm and an overall length of approximately 77 mm. The cartridge neck diameter is typically around 8.65 mm, reflecting its suitability for projectiles with a diameter of 7.8 mm (0.308 inches). Capable of accommodating large rifle primers, this cartridge generates pressures suitable for a balance of accuracy and power.

In terms of ballistic performance, the 7.5 x 55 Swiss is comparable to more modern sporting rounds like the .308 Winchester or .30-06 Springfield. It is often loaded with bullets ranging in weight from 150 to 175 grains, which provide excellent velocity and flat trajectories, making it suitable for various shooting applications including mid to long-range target shooting and competition. Swiss military loads are known for delivering high velocities, typically exceeding 2,500 feet per second.

For reloaders, the 7.5 x 55 Swiss offers several advantages, such as the availability of high-quality reloading components, including brass and match-grade bullets. Given its reputation for accuracy and the robust construction of rifles chambered for this round, reloaders can experiment with a range of powders and bullet weights to fine-tune loads for specific shooting disciplines, such as precision rifle competitions or hunting, ensuring consistent performance and exceptional accuracy tailored to individual preferences and shooting styles.