A headstamp is the marking that appears on the base of a bullet cartridge. It typically includes information such as the manufacturer's name, the caliber of the ammunition, and sometimes additional details such as the year of manufacture or a specific lot number. Headstamps serve several purposes, including identifying the source of the ammunition and providing important information for users, such as collectors and reloaders. The markings can vary in design and style depending on the manufacturer and the type of ammunition.
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