Winchester WMSRL Small Rifle Primers #41 5.56/.223 - 1000 Count

Winchester WMSRL Small Rifle Primers #41 deliver consistent ignition performance for 5.56x45mm NATO and .223 Remington cartridges. These primers feature Winchester's proven cup design and compound formulation that ensures reliable ignition across temperature extremes. Each box contains 1,000 primers packaged for safe storage and handling.

What Makes This Different

The #41 designation indicates these primers are specifically formulated for military-specification 5.56 NATO pressures, which run higher than standard .223 Remington loads. Winchester's compound provides more consistent flame spread compared to standard small rifle primers. The harder cup construction withstands the higher chamber pressures typical in AR-15 platforms and other 5.56 chambered rifles.

Key Features

• Military-spec formulation rated for 5.56 NATO chamber pressures
• Consistent ignition temperature from -40°F to 140°F operating range
• Hardened brass cups resist primer flow under high pressure
• Non-corrosive compound prevents barrel and action damage
• Standard small rifle pocket fit (0.175" diameter)
• Packaged in protective trays with moisture barrier
• Compatible with both 5.56 NATO and .223 Remington cases

These primers maintain ignition reliability in semi-automatic rifles where consistent timing is critical for proper cycling. The compound burns cleanly to minimize fouling buildup in gas systems. Competitive shooters rely on the uniform flame characteristics for consistent velocities across shot strings. The primers function reliably in both bolt-action precision rifles and high-volume semi-automatic platforms.

Technical Specs

• Primer Size: Small Rifle
• Designation: #41 (Military Spec)
• Cup Material: Hardened brass
• Compound: Non-corrosive, lead-free
• Quantity: 1,000 primers per box
• Compatible Calibers: 5.56x45mm NATO, .223 Remington
• Storage Temperature: -65°F to 200°F
• Manufacturer: Winchester Ammunition
• Country of Origin: United States

Handloaders choose Winchester primers for their decades of proven performance in both civilian and military applications. The 1,000-count packaging provides sufficient quantity for serious reloading projects while maintaining reasonable inventory costs. Quality control standards ensure each primer meets Winchester's specifications for sensitivity and output consistency.