Premium .357 Magnum Brass – New & Once-Fired Cases for Reloading

Reload your .357 Magnum rounds with confidence using Diamond K Brass. We carry both new and once-fired .357 Magnum brass, hand-sorted, tumble-polished, and inspected to ensure consistent dimensions, reliable feeding, and excellent reloadability — perfect for revolvers, duty guns, and Cowboy Action competitors.

Why Choose Diamond K .357 Magnum Brass

• Certified Quality: Each lot is inspected for splits, dents, primer pocket integrity, and other defects before packaging.

• Small Pistol Primer: Cases are manufactured to standard primer pocket specs for safe, repeatable reloading.

• Brass & Nickel Options: Choose traditional brass or nickel-plated cases for corrosion resistance and smoother feeding.

• Tumble-Polished & Cleaned: Once-fired cases are delivered free of range debris and ready for depriming, resizing, and loading.

• Mixed Headstamps or Sorted Lots: Available as mixed headstamp lots or headstamp-sorted on request for collectors and specialized needs.

Benefits of Reloading .357 Magnum Brass

Reloading .357 Magnum cases saves money and gives you full control over bullet selection and charge weight — ideal for precision practice, self-defense loads, or competition ammo. Our processed once-fired brass offers near-new performance at a fraction of the price of factory-loaded rounds.

Available Pack Sizes & Bulk Options

We stock .357 Magnum brass in practical pack sizes to meet hobbyist and commercial needs — commonly 100, 500, and 1,000+ counts. Large or recurring orders qualify for volume discounts; contact our sales team for custom quotes and headstamp sorting.

Fast Shipping & Trusted Service

Most orders ship within 24–48 hours and include tracking. Every shipment is securely packaged and backed by responsive customer service to help with product selection or special requests.

How to Order

Choose Your Type: Select new or once-fired .357 Magnum brass and preferred pack size.

Add to Cart: Complete secure checkout in minutes.

Receive & Reload: Track your shipment, receive polished cases, and start reloading.

What Shooters Say

“Diamond K’s .357 Magnum brass is consistently clean and uniform — great for practice and match loads. Fast shipping and excellent customer service.”

Order .357 Magnum Brass Today

Stock your bench with premium .357 Magnum brass from Diamond K Brass — polished, inspected, and ready to reload. Browse our inventory and place your order now to save on bulk pricing and enjoy fast delivery.