Product DescriptionFort Scott Munitions Tumble Upon Impact (TUI) rifle ammunition is built around a match-grade, solid copper projectile engineered to tumble on impact for enhanced terminal performance. This 5.56x45mm NATO 55-grain Solid Copper Spun (SCS) load is designed for precision and consistent function, making it a strong choice for rifle hunting as well as defensive and duty-oriented use where reliable performance matters. Packaged in 20-round boxes (25 boxes per case), it offers lead-free solid copper construction and is manufactured to SAAMI standards.Product Highlights Multi-patented Tumble Upon Impact (TUI) projectile design for effective terminal performance 5.56x45mm NATO 55-grain Solid Copper Spun (SCS) bullet; lead-free solid copper construction Match-grade ammunition tailored for precision shooting and dependable cycling 20 rounds per box; 25 boxes per case for convenient stocking and training volume Listed average muzzle velocity of 3,426 fps (may vary by firearm and conditions)Specs Brand: Fort Scott Munitions Manufacturer Part Number: 556055SCV UPC: 753677048140 Cartridge: 5.56x45mm NATO Bullet Weight: 55 gr Bullet Type/Design: Tumble Upon Impact (TUI) Bullet Material: Solid copper (Solid Copper Spun / SCS) Case Material: Brass Rounds Per Box: 20 Boxes Per Case: 25 Average Muzzle Velocity: 3,426 fps Standards: SAAMIDisclaimer: 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.