Remington Express Ammunition 257 Roberts 117 Grain Soft Point Core-Lokt (20pk)The classic "Green box" ammunition that shooters and hunters have trusted for years. Remington makes ammunition for nearly every need. Core Lokt Ammunition gained its reputation by yielding consistent terminal performance for hunters due to its controlled expansion and high weight retention. This ammunition is new production, non corrosive, in boxer primed, reloadable brass cases. Muzzle Velocity: 2650 fps Muzzle Energy: 1824 ft. lbs.