Product DescriptionWinchester Big Bore is built for trusted performance in both personal defense situations and hunting applications. This .357 Magnum load features a 158-grain Semi-Jacketed Hollow Point (SJHP) bullet engineered to control and delay expansion for massive shock and effective terminal performance when it matters most.Product Highlights .357 Magnum Big Bore handgun ammunition designed for personal defense and hunting use 158 grain Semi-Jacketed Hollow Point (SJHP) bullet helps control and delay expansion High-performance loading delivering strong energy transfer and lethal wound channels 20-round box with brass cases and Boxer primers for reliable ignition Made in the USASpecs Brand Name: Winchester Ammunition Manufacturer Part Number: X357MBB UPC: 020892233010 Cartridge: .357 Magnum Bullet Weight: 158 gr Bullet Type/Style: Semi-Jacketed Hollow Point (SJHP) Rounds per Box: 20 Muzzle Velocity: 1460 fps Muzzle Energy: 748 ft-lbs Case Type: Brass Primer: Boxer Reloadable: Yes Corrosive: No Lead Free: No Country of Manufacture: United States of AmericaDisclaimer: 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.