CCI has been a leading innovator of rimfire ammunition for over 50 years, producing specialized loads to meet the demands of serious hunters and shooters. CCI Shotshell .22 WMR 52 Grain Rimfire Ammo shoots a pattern of fine birdshot pellets for short-range pest control. Pellets are contained in a plastic capsule that does not harm gun barrels; any residue comes out with normal cleaning methods. Producing minimal noise and muzzle blast at sub-sonic velocities, and having virtually no risk of over penetration, makes CCI Shotshell .22 WMR 52 Grain Rimfire Ammo an ideal choice for getting rid of vermin close to human habitation. Plastic capsule loaded with fine birdshot pellets Ideal for short-range pest control Minimal noise and muzzle blast No risk of over penetration