Peterson 300 WSM unprimed brass cases in convenient 50-round packs. Quality reloading components for precision rifle ammunition development and shooting.
Peterson offers shooters a reliable foundation for building accurate 300 Winchester Short Magnum ammunition. These unprimed cases deliver the consistency serious reloaders demand.
Reloading begins with quality components. Peterson cases are manufactured to exacting standards, ensuring uniform wall thickness, consistent case capacity, and reliable performance across multiple reloading cycles. Whether you're developing loads for hunting or precision shooting, Peterson brass provides the foundation for ammunition you can trust.
These unprimed cases allow you complete control over your ammunition development. Select your own primers, powders, and projectiles to create loads tailored to your rifle and shooting requirements. The 300 WSM delivers magnum performance in a shorter, more efficient package—ideal for modern bolt-action rifles.