The Tabatière system was developed from 1864 as a way to convert numerous muzzle-loading weapons (usually Minié rifles) into breech-loading ones, in a process similar to that of the Snider-Enfield in Great Britain, Wänzl rifle in Austria, and the Springfield Model 1866 in the United States.
[1] By July 1870, roughly 358,000 rifles had been converted, while 1.4 million muzzleloaders stayed in their original configuration.
[2] The ammunition was a center fire cartridge closely resembling a shortened 12 gauge shotgun shell.
This weapon system was recognized as ballistically inferior to the Chassepot rifle, therefore it was used by second line troops and in defensive roles.
[1] These are commonly encountered today as "Zulu Guns", after rifles were converted into shotguns and sold cheaply in the late 1800s.