A view showing various original Springfield Trapdoor ammunition. Far left is an early 'Inside Primed' copper cased .45-55-405 Carbine round. Next, essentially the same cartridge, but this one a .45-70-405 Rifle round. Next is a copper cased .45-80-500 2.4 in. cartridge for the extremely rare 'Long Range' Rifle. Second from right is a 'Guard Round' that has 3 .45 cal. Balls in it designed for sentry duty. Far right, a copper cased 'Inside Primed' Blank