This loading upped the velocity by 100 fps (1,260 fps) over that of the. 50 caliber to handle a new centerfire cartridge with a 450-grain lead bullet backed by 70 grains of black powder. The original muzzleloading barrels were sleeved with a liner of. The improved extractor, which first appeared in 1873, was accused of ripping off cartridge case heads and sometimes blamed for Custer's loss at Little Big Horn. Because of this, even the rear sight didn't have to be changed. 58-caliber copper rimfire cartridge that approximated the ballistics of the original muzzleloader's paper cartridge.

The system was adopted in 1865, chambering a. These were honeyed words to penurious ordnance officials. All that is necessary is to cut away the barrel on the top at the breech and add the block and shell extractor, cut the recess in the breech-screw and modify the hammer. Allin explained: 'It is particularly adapted to the alteration of the Springfield rifle-musket (or any other), as it can be done without changing the features of the musket or without throwing away any of its parts. Fast, slick and easy.Īs well as being relatively efficient, the conversion allowed the maximum use of original parts. Upon reopening the block, a rather complicated rack-and-pinion extractor ejected the spent case. The block was then closed, the hammer put on full-cock, and the rifle aimed and fired.

1873 springfield trapdoor rifle parts