5.7x28MM

Premium 5.7×28 Brass – New & Once‑Fired Cases for Reloading

Reload high‑velocity 5.7×28 rounds with confidence using Diamond K Brass. We offer both new and once‑fired 5.7×28 brass, hand‑sorted, and inspected to ensure consistent dimensions and dependable performance. Ideal for FN Five‑Seven pistols, P90/PDW platforms, and precision reloaders who want high‑quality cases for target, duty, or personal‑defense loads.

Why Choose Diamond K 5.7×28 Brass

  • Certified Quality: Every lot is checked for splits, dents, and deformities before packaging.

  • Clean & Ready: Once‑fired cases are cleaned, and packaged so they arrive ready for depriming, resizing, and loading.

  • Consistent Performance: Uniform case geometry and proper neck/shoulder dimensions help deliver predictable pressures and repeatable velocities.

  • New & Once‑Fired Options: Save with our cleaned once‑fired lots or choose factory‑new cases for the tightest tolerances.

  • Bulk Packs & Custom Quotes: Available in practical pack sizes for hobbyists and commercial reloaders. Contact us for headstamp sorting or large‑volume pricing.

About Primers & Reloading Notes

The 5.7×28 is commonly reloaded using Boxer small‑rifle primers in factory cases and reload data — many reloading references and supplier specs list small‑rifle primers as standard. Some reloaders have used small‑pistol primers in certain loads, but primer selection can affect pressure and performance. Always consult reliable load data and your reloading manual before attempting new loads, and follow safe reloading practices.

Fast Shipping & Trusted Service

Most orders ship within 24–48 hours with tracking. We securely package every shipment and include extra cases on certain bulk orders to ensure satisfaction. Diamond K Brass stands behind our products with responsive customer service and a satisfaction guarantee.

How to Order

Choose new or once‑fired 5.7×28 brass and select your quantity.

Add to cart and complete checkout — contact us for bulk quotes or special requests.

Receive tracking and reload with confidence.