Federal Vital-Shok is the premier premium hunting ammunition line offered by Federal. Vital-Shok features the very best bullets from the top manufacturers to ensure that your ammunition will not let you down and give you reliable expansion and retain high mass for a quick, clean and humane kill. The lead free all copper Barnes XPB is good for the environment also.Specifications:Caliber: 460 S&WBullet Weight: 275 GrainsBullet Style: Barnes XPB Hollow Point Lead FreeCase Type: BrassMuzzle Velocity: 1840 fpsMuzzle Energy: 2067 ft. lbs.Round: 20Lead-Free