Winchester super-x rimfire cartridges are the most technologically advanced ammunition.By combining advanced development techniques and innovative production processes, they have elevated ammunition performance to its highest level.Caliber: 17 HMRBullet Type: Hornady XTP Hollow PointBullet Weight: 20 grMuzzle Energy: 250 ft lbsMuzzle Velocity: 2375 fpsCasing Material: BrassRounds Per Box: 50Boxes Per Case: 20Hazair: YesAmmunition cannot be shipped to a P.O. Box, please use a physical address during checkout. For restricted state buyers (CT, IL, NJ), please email a copy of your state's credentials, and a photo ID along your order number to [email protected] within 5 business days to avoid cancellation and refunding your order. For California, Massachusetts 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 [email protected] 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