M003 .50-70-450 Internally Benet-Primed Cartridge – 1868-1869
Description: Nice example of an early .50-70-450 Government cartridge manufactured at Frankford Arsenal between March 1868 and September 1869. This is the straight-case variant, rather than the later cylindrically throated or slightly necked forms. It features a tinned iron (ferrous) internal cup, in contrast to the copper cups adopted in subsequent production.
The cartridge utilizes the Benet priming system, in which the internal cup holds the fulminate compound against the head of the case. While a variety of .50-70 experimental configurations were produced during this transitional period, this pattern represents the design that ultimately replaced the earlier Bar anvil–primed service cartridge. The retaining indents are located approximately .255” forward of the head and are about .186” apart, and this example is noted for having longer-than-typical crimps.
Condition is very good, with the cartridge designation written along the side of the case. This pattern saw official service use from March 1868 through September 1869, placing it firmly within the earliest phase of Benet-primed .50-70 cartridges.
Headstamp: None
Measures: OAL 2.278” CL 1.762” RD .665” HD .566” CM .524” BDaCM .511” Weight 678 Grains
Reference: "Small Arms Ammunition at the International Exposition Philadelphia, 1876” Lewis #355
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Ian Workman
American Civil War Relics &
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