UMC Co. 10 gauge brass shot shells

[countryqt]

I got these from a old house stuffed in a bag in the attic, I dont know anything about them except they are brass and say UMC Co No. 10. Could anyone please tell me what they are and are they worth anything or just scrap. There is about 20 of them, also have about 20 that say Winchester No. 10

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[browningautorifle]

Just what they are...Union Metallic Cartridge brass 10 ga shotgun shells. Pretty hard shape too. You might be able to sell them for a few bucks at a gunshow, but those are available as a user item new today. The black powder residue inside makes them a bit less. Might crack first shot.