Weatherby Select Plus 257 Weatherby Magnum ammunition features premium 100 grain Swift Scirocco bullets delivering exceptional accuracy and terminal performance with 3575 FPS muzzle velocity and 2838 ft-lbs muzzle energy.Weatherby Select Plus 257 Weatherby Mag ammunition100 grain Swift Scirocco polymer-tipped bulletsHigh velocity: 3575 FPS muzzle velocityPowerful energy: 2838 ft-lbs muzzle energyPremium brass casing for reliable performance20 rounds per boxIdeal for long-range hunting and precision shooting this premium ammunition combines Weatherby's renowned quality with Swift's advanced Scirocco bullet technology for superior ballistic performance and consistent accuracy.