Starline 458 SOCOM Brass

Starline 458 SOCOM Brass

Starline 458 SOCOM bulk brass is manufactured to deliver uncompromising performance for shooters and reloaders who demand strength, consistency, and reliability from every cartridge they build. Backed by over three decades of experience in producing premium cartridge cases, Starline employs rigorous quality control, precise tooling, and consistent metallurgy to produce brass that stands up to the demands of high-pressure loads. Each case is guaranteed to meet exacting tolerances for length and diameter, with verified flash hole presence to ensure dependable ignition across every lot.

Unlike many competitors, Starline utilizes a vertical drawing process during manufacturing, significantly reducing wall thickness variation and enhancing overall uniformity. The result is brass with excellent case integrity and longevity, even under repeated firings. Starline 458 SOCOM brass is particularly well-suited for magnum-level hunting loads and performs exceptionally in large bore AR-15 platform rifles. Whether you’re pursuing dangerous game or building subsonic loads for suppressed shooting, this brass offers strength and flexibility to match your build’s specific needs.

This brass has been tested under high-pressure scenarios and is produced with enough stiffness to handle the rigors of modern reloading demands. For users working with black powder or reduced pressure loads, Starline recommends annealing the case mouth to ensure proper chamber sealing. This provides consistent internal ballistics and safer operation with non-standard load types. A detailed annealing guide can be found in their Commonly Asked Questions, section #4.

Whether you’re building custom hunting rounds, experimenting with subsonic performance, or simply wanting to extend your brass lifespan, Starline 458 SOCOM bulk brass offers unmatched value and performance for any reloader.

OAL: 1.569″ – 1.576″

* This is NOT loaded or primed ammunition *