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A .32 ACP FMJ cartridge, a .32 ACP FMJ cartridge in a blued .303 British supplemental chamber, and a .303 British FMJ cartridge (left to right) A caliber conversion device is a device which can be used to non-permanently alter a firearm to allow it to fire a different cartridge than the one it was originally designed to fire.
Remington Conversion cal .46 RF Remington Conversion, Rollin White Patent. In 1868, Remington began offering five-shot metallic cartridge conversions of the revolver in .46 rimfire. Remington paid a royalty fee to Smith & Wesson, owners of the Rollin White patent (#12,648, April 3, 1855) on bored-through revolver cylinders for metallic ...
In firearms, the cylinder is the cylindrical, rotating part of a revolver containing multiple chambers, each of which is capable of holding a single cartridge. The cylinder rotates (revolves) around a central axis in the revolver's action to sequentially align each individual chamber with the barrel bore for repeated firing.
After the introduction of the .45 Colt cartridge, in 1873, the conversion of .44 caliber percussion revolvers began. Percussion cylinders were replaced with rear loading cartridge cylinders. This allowed the use of the .45 Colt cartridge. The load range for this cartridge was typically 28 to 40 grains of black powder.
The first metallic cartridge revolver made by Colt was the Thuer-Conversion Model Revolver, a design that would not require a cylinder with cylindrical chambers so as not to infringe on the Rollin White patent. A small number (about 1000–1500) of Model 1851 Navy revolvers were converted, using front-loaded, slightly tapered cartridges to fit ...
Bored-through, breechloading cylinder and the loading gate are both clearly visible. Beginning in 1867, Adams Patent Small Arms Company of London started the conversion of the existing percussion revolvers into breechloaders using .450 Boxer centerfire cartridges, and simultaneously, the production of new breechloading revolvers began. [5] [6]
Rollin White (June 6, 1817 – March 22, 1892) was an American gunsmith who invented a single shot bored-through revolver cylinder that allowed paper cartridges to be loaded from the rear of a revolver's cylinder. Because the open breeches were unprotected from lateral fire, all charges would instantly explode in a chain fire.
A cartridge (consisting of powder and a lead ball) was loaded into the front of the chamber and then compressed with a plunger that was located beneath the barrel. Once the cylinder's chambers were loaded, percussion caps were placed over the vent nipples at the rear of the cylinder. The weapon was now ready to fire.