Product Description Winchester Ammo Super-X rimfire ammunition is built for dependable performance in the field and at the range. This .22 Winchester Magnum Rimfire (WMR) load features a 40-grain Full Metal Jacket (FMJ) bullet designed for consistent feeding, flat shooting accuracy, and deep penetration. Packaged 50 rounds per box and 40 boxes per case, it delivers the time-proven reliability Super-X has been known for since 1922. Product Highlights .22 WMR (22 Win Mag) rimfire ammunition with a 40-grain Full Metal Jacket (FMJ) bullet Supersonic performance rated at approximately 1910 fps for flat-shooting trajectories FMJ design supports reliable feeding and consistent, sure-fire ignition Brass case construction for dependable cycling and durability Bulk-friendly packaging: 50 rounds per box and 40 boxes per case Specs Brand: Winchester Ammo Product Line: Super-X Cartridge/Caliber: .22 Winchester Magnum Rimfire (22 WMR) Bullet Weight: 40 gr Bullet Type/Style: Full Metal Jacket (FMJ) Case Type/Material: Brass Muzzle Velocity: 1910 fps Muzzle Energy: 324 ft-lbs Rounds Per Box: 50 Boxes Per Case: 40 Country of Manufacture: United States (Made in USA) UPC: 020892100732 Manufacturer Part Number: X22M 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.