The ats has an extremely hard slug weighing 27.5 g (424 gr.).Within usual shooting distances of up to approx.50 meters, it shows an outstanding stopping power and can be used with any type of shotgun barrel.Gauge: 12 GaugeType: LeadLength: 2.75"Ounces: 1 3/8 ozShot Size: SlugMuzzle Velocity: 1650 fpsRounds Per Box: 5Boxes Per Case: 40Application: Personal/Home DefenseHazair: 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