Product DescriptionWinchester PDX1 Defender is engineered for personal defense performance, designed to maximize terminal ballistics in accordance with FBI test protocol. This .40 S&W load features a bonded jacketed hollow point (JHP) bullet, using Winchester's bonding process to weld the jacket to the lead core for improved penetration, controlled expansion (up to 1.5x), and dependable retained weight when it matters most.Product Highlights Bonded JHP design helps promote reliable penetration and controlled expansion for personal defense use Engineered to maximize terminal performance under FBI protocol-style testing Notched jacket design is designed to expand into uniform segments for consistent performance .40 S&W 165 grain defensive handgun ammunition optimized for carry and home defense Convenient 20-round box for range function checks and defensive readinessSpecs Brand: Winchester Ammunition Model/Line: PDX1 Defender Caliber: .40 S&W Bullet Weight: 165 gr Bullet Type: Bonded Jacketed Hollow Point (JHP) Muzzle Velocity: 1,140 fps Muzzle Energy: 476 ft-lbs Case Type: Brass Rounds per Box: 20 Country of Manufacture: USA MPN: S40SWPDB UPC: 020892217850Disclaimer: 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.