SK's High Velocity .22 Long Rifle Ammunition was designed for the discerning rimfire enthusiasts who demand speed and accuracy. These cartridges exit the muzzle at a blistering 1263 fps, which is nearly 200 fps faster than the average .22lr which is just 1070 fps. The round-nose, 40 grain projectiles get their high velocities from SK's proprietary blend of high-powered, clean burning propellent. These cartridges are available in 500 and 5000 count boxes and reliable in nearly every .22lr platform.