Peterson Cartridge 300 RUM Unprimed Brass Rifle Casings - 250 Count Bulk

The Peterson Cartridge .300 RUM unprimed brass rifle casings ship in a 250-count bulk shooter pack, factory sealed for long-term storage and bench convenience. Peterson Cartridge is a family-owned, American manufacturer headquartered in Pittsburgh, Pennsylvania, building match-grade brass rifle casings designed from the case up for long-distance shooting and precision handloading.

Peterson's American-made casings are built around tight dimensional consistency, multiple quality inspections, and properly annealed necks so reloaders can chase sub-MOA accuracy when paired with quality components and disciplined load development. Each .300 Remington Ultra Magnum case is formed from premium brass and inspected to Peterson's match-grade standards before packing.

This configuration is the 250-count shooter pack, supplied in sealed factory bags for high-volume reloaders, hunters, and long-range competitors who want a deep supply of premium brass on hand. Casings are sold unprimed, ready for the reloader to fit with their chosen magnum primer, powder, and projectile to build a custom handload.