Starline Unprimed Rifle Cases .308 Winchester / 7.62x51mm NATO (MPN: 308WINEUP50)
Precision handloaders running match bolt-action rifles, gas-operated AR-10s, or hunting platforms know that consistency downrange starts with uniform brass dimensions at the bench. Starline engineered their .308 Winchester / 7.62x51mm NATO unprimed cases specifically to solve the common reloading headaches of inconsistent neck wall thickness, uneven flash holes, and short case-life cycles. Designed to meet strict dimensional tolerances, these premium component cases give handloaders the foundation needed to craft match-grade handloads tailored to their specific chamber dimensions.
Manufactured in Sedalia, Missouri, Starline utilizes advanced drawing and annealing processes to ensure maximum structural integrity and grain structure uniformity. Featuring a small primer pocket design (or standardized large rifle pocket depending on batch spec) and precise flash hole alignment, these cases exhibit exceptional neck wall concentricity and case head hardness. The brass undergoes vertical annealing along the case neck and shoulder to balance flexibility with rigidity, allowing for crisp neck tension holding and smooth sizing operations without early metal work-hardening or shoulder splitting.
At the loading bench and out on the range, expect smooth feeding and effortless extraction across bolt-actions and semi-automatic platforms alike. These unprimed component cases come factory-cleaned, deburred, and packaged ready for initial sizing, neck expanding, and priming. Whether you are tailoring heavy-projectile subsonic loads for suppressed shooting or pressing match-grade handloads for long-range target scoring, this 50-count bag delivers American-made precision with every reload cycle.
Armorer Bench Notes & Technical Maintenance Guidance
Shipping Restrictions: Unprimed brass component cases are not subject to standard hazardous ammunition shipping rules and can ship via standard ground services. Always inspect component shipments prior to handloading.
Armorer Tip: Although Starline brass is manufactured to extremely tight tolerances, always full-length size, chamfer, and deburr virgin brass necks prior to your first loading pass. This ensures perfectly round case mouths and prevents jacket shaving during bullet seating. When reloading for semi-automatic platforms like the AR-10 or M1A, verify head-space with a drop gauge and check case overall length (COL) after sizing to maintain reliable chambering and prevent slam-fires.
Key Features
- Precision Vertical Annealing: Shoulder and neck are state-annealed to maximize case life and prevent premature neck splitting.
- Uniform Wall Concentricity: Tight neck and wall tolerances ensure consistent bullet seating depth and neck tension.
- Heavy-Duty Case Head: Hardened base structure handles high pressure loads and resists primer pocket enlargement over multiple reloads.
- Clean Flash Hole Centerline: Drilled and deburred flash holes provide uniform flame propagation from the primer into the powder column.
- 100% American Made: Produced in Missouri under rigorous quality assurance protocols for serious handloaders.
Product Specifications
- Brand: Starline Brass
- Product Line: Unprimed Rifle Component Cases
- MPN: 308WINEUP50
- UPC: 810742025816
- Caliber / Gauge: .308 Winchester / 7.62x51mm NATO
- Item Condition: Virgin Unprimed Brass Cases
- Primer Pocket Type: Large Rifle Primer (LRP) Standard Pocket
- Casing Material: High-Grade Brass (Reloadable)
- Finish: Natural Raw Annealed Brass
- Package Quantity: 50 Cases per Bag
- Master Case Quantity: 500 / 1,000 Cases Bulk
