Product Description The Winchester Ammo Centerfire Rifle Reloading Bullets (WB556MC55X) are precision-engineered components built for shooters who demand consistent, reliable performance from every round they reload. Designed for the popular 5.56x45mm NATO/.224 caliber platform, these 55-grain Full Metal Jacket Boat Tail (FMJBT) bullets deliver exceptional accuracy, flat trajectories, and dependable terminal performance. Each bullet features a copper jacket over a lead core, a boat tail base for improved ballistic stability, and a G1 ballistic coefficient of 0.255, making them ideal for range training, target shooting, and general plinking. Proudly made in the USA, these Winchester Components meet the high standards the brand has maintained for generations. Each box contains 100 bullets. Product Highlights Precision Reloading Components: Custom-designed and manufactured to tight tolerances for consistent, repeatable on-target performance in 5.56x45mm NATO rifles. Full Metal Jacket Boat Tail Design: The FMJBT profile reduces drag, improves ballistic coefficient (G1 BC = 0.255), and enhances downrange accuracy. Lead Core with Copper Jacket: High-quality construction with a lead core and copper jacket ensures reliable feeding, consistent expansion characteristics, and minimized barrel fouling. Versatile for Range Use: Well-suited for target shooting, range training, and plinking, offering an excellent balance of performance and value for high-volume reloaders. Made in the USA: Manufactured domestically to Winchester&';s rigorous quality standards, ensuring batch-to-batch consistency reloaders can count on. Specs Brand: Winchester Ammo Manufacturer Part Number (MPN): WB556MC55X UPC: 020892634084 Caliber: 5.56x45mm NATO Bullet Diameter: .224" (0.224 in) Bullet Weight: 55 Grain Bullet Type: Full Metal Jacket Boat Tail (FMJBT) Core Material: Lead Jacket Material: Copper Cannelure: No G1 Ballistic Coefficient: 0.255 Count: 100 Bullets per Box Country of Manufacture: USA Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>