With its reduced noise and less recoil, hornady's subsonic makes an ideal training round for new shooters and provides a more enjoyable and successful shooting experience for anyone.The flex tip of the sub-x bullet, combined with long grooves in its gilding metal jacket and the bullet's flat profile, helps it expand at low velocities with no loss in accuracy.Unique powders for subsonic use result in low flash signature with or without a suppressor.Hornady subsonic ammunition is even quieter than a supersonic round.Specifications: 300 blackout/190 gr sub-x (sx)/20 per box/10 csCaliber: 300 BlackoutBullet Type: Sub-X (SX)Bullet Weight: 190 grMuzzle Energy: 465 ft lbsMuzzle Velocity: 1050 fpsRounds Per Box: 20Boxes Per Case: 10Application: HuntingCasing Material: BrassHazair: 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