Coins made from used cartridges, I know someone had a topic on these. But can not find.

Like the US 1 cents coins made after WWII. But the Colombian civil war coins from the Province of Santander of 1902. Were made from the bass of used cartridges. There are really instigation provisional coin, made by General Ramon Gonzales Valencia who governed the province of Santander in 1902.

This one is from Nepal.
4 paisa coin
https://en.numista.com/catalogue/pieces15218.html

The cartridge also called a shell so >

'Supposedly, the copper was obtained from spent shell casings from U.S. ammunition'.
https://en.numista.com/forum/topic40372.html

'... the 1943 Nicaragua 1 Centavo minted from recycled brass shell casings'.
https://en.numista.com/forum/topic31510.html#p266202

Maybe this topic from August was the one >
https://en.numista.com/forum/topic73136.html