Buffalo bore's 357 mag.Ammo adds more power than ever before to the 357 mag.This ammo is safe to shoot in any all-steel 357 revolver, including j frames.This ammo is no harder on your gun than any other normal 357 ammo.Note: this ammo is not recommended to be fired in super light alloy revolvers.Caliber: 357 MagBullet Type: Jacketed Hollow Point (JHP)Bullet Weight: 125 grMuzzle Energy: 802 ft lbsMuzzle Velocity: 1700 fpsRounds Per Box: 20Boxes Per Case: 12Application: Performance,ProtectionCasing Material: BrassHazair: 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 [email protected]&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 [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