Winchester WSC10MMU Unprimed Brass Cases 10mm Auto 100/Bag

Winchester WSC10MMU unprimed brass cases deliver the foundation for precision 10mm Auto handloads with consistent wall thickness and proper headspace dimensions. These factory-fresh cases eliminate the variables that come with mixed brass, providing reloaders with uniform starting components for accurate ammunition development.

What Makes This Different

Winchester produces these cases using the same quality control standards as their loaded ammunition, ensuring consistent case capacity and primer pocket dimensions. The brass alloy maintains optimal hardness for multiple reloading cycles while resisting case head separation. Each case features uniform wall thickness that promotes even powder burn and consistent velocities compared to mixed range brass.

Key Features

• Factory-new unprimed brass cases ready for custom loading
• Consistent case capacity for uniform powder charges and velocities
• Proper headspace dimensions ensure reliable chambering and extraction
• Quality brass alloy supports multiple reloading cycles
• Uniform primer pocket depth for consistent ignition
• Clean, bright finish eliminates sorting and case prep time
• 100-count bag provides sufficient quantity for load development

These cases handle the full range of 10mm Auto applications from target loads to maximum hunting charges. The consistent case capacity allows reloaders to develop accurate loads for competition shooting, while the durable construction withstands the pressures generated by heavy 200-grain bullets at full velocity. Range testing shows these cases maintain dimensional stability through extended firing cycles.

Technical Specs

• Caliber: 10mm Auto (.40 S&W length)
• Case length: 0.992 inches
• Material: Quality brass alloy
• Condition: New, unprimed
• Primer type: Large pistol
• Package quantity: 100 cases per bag
• Manufacturer: Winchester Ammunition
• Country of origin: United States

Serious reloaders choose Winchester brass for its consistency and reliability across multiple loading cycles. The uniform case preparation saves valuable range time while delivering the accuracy potential that 10mm Auto cartridges demand.