interesting info about this ammo, you learn alot here!
This is a cartridge that contains no gunpowder. The little 20gm bullet is solely propelled by the powerful Eley priming mix. For this reason, it does not generate any significant pressure. Due to the lack of noise when fired, the .22 Colibri may be shot indoors, even in the living room, provided a proper back stop is available. The .22 Colibri may be used to eliminate pests such as rats. It may be fired in any .22 LR rifle or pistol, however, it will not cycle the slide of semi-automatic guns. It has a solid point made of lead. The Colibri is about twice the weight of a .177 caliber pellet but doesn't go as fast. However it hits a bit harder than a .177 pellet
