In firearm terminology, what does a 'cartridge' refer to?

A 'cartridge' refers to the complete round of ammunition that is ready to be fired from a firearm. It typically includes a casing, primer, propellant, and projectile (bullet). This definition encompasses all the components needed for the cartridge to function as intended when loaded into a weapon.

Understanding cartridge terminology is crucial for crime scene analysts, as they frequently encounter ammunition components at scenes. Each element of the cartridge plays a significant role in the firing process.

The other options misinterpret the term 'cartridge.' While the actual weapon used to shoot is critical to the context of firearms, it does not define what a cartridge is. Similarly, while there are cases that contain bullets, the term 'cartridge' specifically refers to the complete assembly, not merely a storage case. Loading a bullet refers to the action of inserting a round into the chamber of a firearm or magazine, which is related but distinct from the definition of a cartridge itself.