Sk's semi-auto rifle is designed to outperform, replace and eventually retire all other inferior semi-auto ammunition offerings currently crowding the market.Its built to deliver pinpoint accuracy while functioning flawlessly through any 10/22 style firearms, ar's, 597's, 64's, and more.Caliber: 22 LRBullet Weight: 40 grMuzzle Energy: 1126 ft lbsMuzzle Velocity: 1132 fpsCasing Material: BrassRounds Per Box: 50Boxes Per Case: 100Hazair: YesAmmunition cannot be shipped to a P.O. Box, please use a physical address during checkout. For restricted state buyers (CT, IL, MA and NJ), please email a copy of your state's credentials, and a photo ID along your order number to ffl@firearmsdepot.com&nbsin 5 business days to avoid cancellation and refunding your order. For California and New York buyers, please have your dealer email us a copy of their FFL or Ammo Vendor License along with your order number to ffl@firearmsdepot.com within 5 business days to avoid cancellation and refunding your order. Your order will not ship without us receiving this information. Thank you for your cooperation