SK High Velocity Match .22 LR Ammunition SK High Velocity Match exits the muzzle at a blistering 1,263 feet per second (385 m/s). Disciplines such as PRS Rimfire and NRL22 trust High Velocity Match to strike on-target with both speed and precision. SK's 40 grain round-nosed projectile is combined with a proprietary blend of clean-burning, high-energy propellant for reliable functioning in all platforms - shot after shot. 50 Ct Box Ballistic Data: Weight: 2.59 g/40 gr Test Barrel Length: 660 mm/26 in