Premium .300 WSM Brass – New & Once-Fired Cases for Reloading

Reload with confidence using Diamond K Brass .300 WSM brass. Our new and once-fired .300 Winchester Short Magnum cases are hand-sorted, tumble-polished, and carefully inspected to ensure consistent dimensions, reliable chambering, and superior performance. Perfect for precision hunters, long-range shooters, and competitive reloaders.

Why Choose Diamond K .300 WSM Brass

• Certified Quality: Every case is inspected for splits, dents, or deformities before shipping.

• Consistent Performance: Uniform case geometry provides predictable pressures and accurate, repeatable shot placement.

• New & Once-Fired Options: Choose economical once-fired brass or pristine new cases for match-grade loads.

• Ready to Process: Once-fired brass is cleaned and polished—ready for resizing, depriming, and loading.

Bulk Options & Quantities

We stock .300 WSM brass in multiple pack sizes to meet hobbyist and commercial reloading needs. Standard quantities include 100, 500, and 1,000-count packs. For custom headstamp sorting or large-volume orders, contact our team for a quote.

Save Money Without Sacrificing Accuracy

Reloading with once-fired .300 WSM brass gives you the opportunity to save significantly versus factory-loaded ammunition while maintaining precision performance. Diamond K Brass delivers reliable cases suitable for long-range precision, hunting, and target practice.

Fast Shipping & Trusted Service

Most orders ship within 24–48 hours via USPS, securely packaged with tracking. Diamond K Brass is recognized nationwide for quality, consistency, and responsive customer service.

Order Your .300 WSM Brass Today

Whether you need once-fired or new .300 WSM brass, Diamond K Brass provides premium cases ready for reloading. Shop online today and reload with confidence.