Product Description Winchester PDX1 Defender is engineered to maximize terminal ballistics as defined by FBI test protocol, delivering dependable performance for personal defense. This .357 Magnum load features a 125 grain bonded jacketed hollow point bullet designed to improve penetration and promote controlled expansion. Winchester&';s proprietary bonding process welds the jacket to the lead core to help retain weight when it matters most. Product Highlights .357 Magnum personal defense ammunition built to FBI terminal-performance standards 125 grain bonded jacketed hollow point (BJHP) for controlled expansion and penetration Advertised muzzle velocity: 1,325 feet per second 20 rounds per box for convenient carry, staging, and rotation Brass-cased, centerfire pistol ammunition for reliable function in compatible firearms Specs Brand: Winchester Ammunition Line: PDX1 Defender Caliber: .357 Magnum Bullet Weight: 125 grain Bullet Type: Bonded Jacketed Hollow Point (BJHP) Muzzle Velocity: 1,325 fps Muzzle Energy: 487 ft-lbs Rounds Per Box: 20 Cartridge Case Material: Brass Primer: Centerfire Application: Personal Defense Country of Manufacture: USA UPC: 020892218864 Manufacturer Part Number: S357MPDB 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.