Anatomy of a Cartridge aka A definition of a "Pew"
Here is a display which show's the anatomy of a cartridge. It has a fired bullet, a bullet separated from the case below a primer, which is next to a completed round. It can be made with a 380, a 9mm, a 40 cal and or 45 ACP. Anything bigger would require a bigger mold which in return would cost more.