Call me a moron, but are these uh....cases? i try and use/click them and nothing happens. what are these and how do they work?

Thanks!!

They are empty casings, that you can load at a reload table. If you have the ingredients.

Its for crafting ammo. Took me awhile to figure it out. You also need primer, powder, and lead.

The "case" ammo are empty bullet casings, which you can use to craft ammo. Apparently there's a random chance you'll get a case every time you shoot a bullet.

There's also "box" ammo, which you can buy at the general store. To get these to work, you have to buy the box, then drop it on the ground (right-click), then pick it up again, and the box will turn into 100 bullets.