Читать книгу The Gun Digest Book of .22 Rimfire. Rifles·Pistols·Ammunition онлайн

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Another cartridge design consisted of a closed tube that contained the bullet and propellant with the primer being contained in a small protruding portion at the rear end of the tube. This type of cartridge, known as the Moore teat fire, was loaded into the front of the cylinder of a revolver with the teat at the rear where it could be struck by the hammer. The front end of the cartridge was flared to form a retaining flange that fit against the front of the cylinder. Cartridges of this design were produced in the mid-1800s. Because the protrusion that held the primer was located in the center of the cartridge head, it was actually a center fire design rather than a true rim fire.

Each of the early cartridge designs described above contained a primer that was sensitive to shock. Subsequent designs would also rely on shock or percussion to cause the primer to explode, but the primer would be located differently in the cartridge. In 1845, a man named Louis N. Flobert in France loaded a round ball in a percussion cap and produced a small cartridge known as the 22 caliber BB (bulleted breech) cap. Power was the result of the primer since no powder was used. Some American versions of this cartridge employed a conical bullet (hence these were known as CB caps) that was loaded over a small powder charge. In 1851 at an exhibition in London, Horace Smith and Daniel B. Wesson became convinced that this cartridge design could be refined.