I am completing an archeological report on a survey conducted along the Texas border with Mexico. I am trying to identify a cartridge case headstamp but am having no luck. It appears to be a .44-40 caliber although the case length is 1.27 inches as opposed to 1.305. Otherwise pretty close.
The headstamp has a “UMM” at the top, a “44 WRA” at the bottom, a “P” on the left side and an “L” on the right side. The lower designation would seem to indicate it was meant for the 44-40 Winchester. Could this be of Mexican manufacture?
I suspect this is an old cartridge based on its condition and the context of the site.
Would be happy to post a photo if that would help (the font is unique and is set into a shallow depressed area between the rim edge and the primer.