Found these UMC primers. Anyone know anything about them?

[Vdoe]

 

[heavygold4me]

Here is a useful link https://cartridge-corner.com/shotgun.htm. I use the one a lot

 

[shuvelrider]

They appear to be from old paper shotgun shells, the paper rotted away a long time ago if you found them in the ground, 12 gauge. You could drill out the center and use a brass screw to fasten them to a board for display, especially if you find more. Those brands are no longer around.

 

[GroundSweeper]

Cool headstamps (not primers, the primers are the smaller center pieces where the firing pin hit them). Very nice shape too. I kinda like them myself, I plan to make a display some day of the ones I've found.

 

[Iggyks]

How did you get them that clean? Nice!

 

[hoser]

Very cool. I have found hundreds of headstamps over the years but never thought about collecting them. I can see where you could make a very nice display out of them.