This refers to the specific load information provided by Hornady Manufacturing Company for the .270 Winchester Short Magnum (WSM) cartridge. This data typically includes recommended powder types and charges, bullet weights and styles, overall cartridge length, and expected performance metrics such as velocity and pressure. For instance, a specific entry might recommend a certain weight of Hornady’s ELD-X bullet propelled by a specific powder charge to achieve a specific muzzle velocity.
Accurate load information is crucial for safe and effective handloading. Using manufacturer-provided data ensures optimal performance and helps prevent dangerous overpressure situations. Historically, handloaders relied on generalized data or information shared amongst experienced reloaders. The availability of manufacturer-specific data like this significantly enhances safety and precision in handloading, contributing to better accuracy and consistency in the field. It allows handloaders to tailor ammunition to their specific rifles and intended applications, such as long-range shooting or hunting.