The Hornady .300 Wby Mag Unprimed Rifle Cartridge Cases provide a premium, structurally superior foundation custom-built for high-volume handloaders creating high-performance ammunition for the legendary .300 Weatherby Magnum platform. These select reloading components are engineered in small, tightly monitored production lots to verify perfect consistency in internal powder capacity, raw weight, and wall concentricity. Designed to securely accommodate proper bullet alignment, the specialized case necks reduce runout to deliver a crisp, uniform projectile release down the barrel with minimal mouth deformation. To easily withstand the intense chamber pressures generated by magnum propellants, every piece undergoes an intensive factory calibration process to enhance case expansion memory across multiple reloading cycles. Packaged as a loose component box of 50 unprimed rifle cases, this American-made brass uses a durable Large Rifle primer configuration to provide target marksmen and big game hunters complete control over their ignition physics.