headstamp

head +‎ stamp

headstamp (plural headstamps)

1. (military, firearms) The identification marking on the base (bottom) of a cartridge casing.
   • 2009 Chivers, C.J. (The New York Times), Is U.S. Ammo going to Taliban?; run in Austin American-Statesman, May 20, 2009, p A-1:
     • Photographs were taken of the weapons' serial numbers and [of the] markings on the bottoms of the cartridge casings, known as headstamps, which can reveal where and when ammunition was made.

• ammo, ammunition
• bullet, round

• breechloading
• cartridge, case, shell

headstamp (third-person singular simple present headstamps, present participle headstamping, simple past and past participle headstamped)

1. (transitive) To affix a headstamp to.

• Hampstead