Remington Thunderbolt 22 Long Rifle 40gr RN Rimfire Ammo - 500 Rounds -cartridges are recommended for a variety of applications, including plinking, target shooting, and small game hunting. This ammo feeds very well and is ideal for use with semi-automatic rifles and pistols, and features a velocity of 1,255 FPS with 140 ft lbs of energy. At 100 yards, you can expect a velocity of 1,017 fps and 92 ft. lbs. of energy. Remington Thunderbolt 22 Long Rifle 40gr RN Rimfire Ammo comes equipped with a 40-grain, round nose bullet for a consistent shooting experience. Round-Nosed Bullet High-Velocity Projectile 500 Rounds Per Box