This refers to specific reloading information tailored to the .270 Winchester Short Magnum (WSM) cartridge used with MagPro powder. It typically includes recommended powder charges, bullet weights, overall cartridge lengths, and expected velocities. An example would be a table suggesting a specific weight of MagPro powder paired with a 130-grain bullet, resulting in a predicted muzzle velocity. This precise information is essential for safe and effective handloading.
Accurate and reliable reloading data is crucial for achieving optimal performance and safety when handloading ammunition. Developing custom loads allows shooters to fine-tune their rifles for specific needs like long-range accuracy or hunting. Historically, handloading arose from a desire for customized performance and cost savings, and with modern propellants like MagPro, reloaders can achieve a high degree of precision. This data empowers handloaders to tailor their rounds, maximizing the capabilities of the .270 WSM cartridge.