Posted at request of collector in Argentina:
I’m member of the AACAM (Asociación Argentina Coleccionistas de Armas y Municiones - Guns and Ammunition Collectors Argentine Association). At this time, I’m working with an archeologist team in an historical site where there took place a battle in november 1874. They found a lot of head cases (the rest of the case dissapered in the ground…) with Berdan primers, with the classic UMC headstamp (concentric circle). But there are also a few ones with plain base and a Boxer primer.
My first question is: how many years UMC load his cartridges with Berdan primers. In that battle the soldiers were armed with Remington rolling block rifles in .43 Spanish caliber.
In a map of the battle dated in 1875, there is a mention about the use of Martini Henry rifles. In that case, we can think that the Boxer primed cases were for Martini Henry Rifles, but the rim diameter is small than .577/.450 MH cartridges. And the second question: may be that those Martini Henry rifles were chambered for the .45" Ball Boxer Henry Experimental cartridge (with straight case)?
Thanking you in anticipation
Alejandro Millar (AACAM Nr.243)