The Hornady .338 Marlin Express Unprimed Rifle Cartridge Cases provide an exceptionally uniform and premium structural foundation for precision handloaders developing custom ammunition for this high-performance lever-action caliber. Manufactured in small, specialized lots under rigid quality control standards, this high-grade rifle brass ensures excellent case-to-case consistency in internal volume, weight, and wall dimensions. Every case features precision-measured tight wall concentricity to minimize bullet runout and guarantee an ideal chamber fit, facilitating a clean, identical projectile release upon ignition. To withstand demanding field and hunting pressures, Hornady subjects this component brass to rigorous factory pressure calibration testing to promote completely uniform case expansion during firing. Packaged as a loose component box of 50 unprimed brass cases, this American-made product features a standard Large Rifle primer pocket profile to give custom reloaders total command over their ignition properties.