Product DescriptionFor time-tested personal defense performance, Federal Premium Hydra-Shok is built around a proven center-post jacketed hollow point design engineered for optimized penetration and consistent, threat-stopping expansion. Hydra-Shok's notched copper jacket helps initiate and control expansion while delivering accurate, reliable terminal performance for defensive use.Product Highlights Proven Hydra-Shok center-post jacketed hollow point design for reliable expansion Notched copper jacket helps initiate and control expansion Designed for personal defense with consistent ballistic performance .40 Smith & Wesson caliber with 165 grain projectile weight 20-round box with listed 980 feet-per-second muzzle velocity (4-inch test barrel)Specs Brand: Federal Product Line: Federal Premium Hydra-Shok (Personal Defense) Caliber: .40 Smith & Wesson (.40 S&W) Bullet Type: Hydra-Shok Jacketed Hollow Point (JHP) Bullet Weight: 165 grain Muzzle Velocity: 980 fps Test Barrel Length: 4 in Rounds Per Box: 20 Intended Use: Self-Defense Country of Manufacture: USA UPC: 029465089467 Manufacturer Part Number: P40HS3Disclaimer: 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.