Which term refers to the markings on ammunition head that indicate caliber and manufacturer?

• A. Powder
• B. Rim
• C. Bullet
• D. Headstamp

Answer: (D)

The markings on the base of a cartridge that indicate caliber and manufacturer are called the headstamp. These markings are stamped into the primer end of the cartridge case and typically include the manufacturer's initials and the caliber, sometimes with the production year or lot number. This identification helps ensure you’re using the correct ammunition and aids in tracing ammo sources. The other terms refer to different parts: powder is the propellant inside that powers the round; the rim is the edge around the base on rimmed cartridges; the bullet is the actual projectile. So the base markings used for identification are the headstamp.