The Martini Henry rifle utilised the Boxer cartridge, a foil brass round rolled around a mandrel, with a steel base plate. The primer was a Berdan primer containing Fulminate of Mercury. The idea of the foil round was to expand on firing and create a good seal, however the three part construction was prone to falling apart on firing, or, jamming into the chamber if not ejected quickly, due to the brass softening. In the picture below are the various rounds and bullets of the period. The bullets were supplied in paper packets of 10 rounds. These in turn were supplied in hardwood storage boxes of 60 packets.
Left: A .577/.450” Mk3 Martini Henry rifle round. 480 grain lead bullet. White paper jacket.
Middle: A .577/.450” Martini Henry Carbine round. 410 grain bullet. Red paper Jacket.
Third Left: A .577 Snider round. Later drawn brass case. Top right a .591” snider bullet.
Bottom right: A .450 Pistol round.