what is the cartridge of a bullet called?\nOptions:\n- bandolier\n- gun shop\n- magazine\n- casing\n- gunpowder
Please answer the following question by reasoning step-by-step.
casing
Cartridge is the packaging of a bullet.

Casing covers something.

The cartridge of a bullet can be cased.

Casing is a thing.

.

The answer: casing