The headstamp is punched into the base of the cartridge during manufacture.

Brass cases for each of these cartridges carry the applicable name within the headstamp.

A headstamp is the markings on the bottom of a cartridge case designed for a firearm.

The original 41LC brass cases came in three primary lengths, although they vary quite a bit within a headstamp.

The tip of the bullet was painted black, and the headstamp said LC 44.

They show a cartridge with what appears to be an externally-lubricated heeled bullet and without a headstamp.

Ultimately the headstamp was updated to read, "Triton .40 Super".

The first step to ensuring consistent case capacity is sorting the cases by headstamp, so each lot of cases is from the same manufacturer and/or year.

The modified Roberts cases are sometimes known as 6.5x.257 Roberts, although the case headstamp may still indicate .257 Roberts.

Determination of corrosive or non-corrosive characteristics based on the primer type should consider these final headstamp dates of corrosive ammunition production:

Ammunition that is loaded to +P pressures is clearly marked on the headstamp as such, for example a 9mm would be marked "9mm Luger +P".

Cordite-loaded cartridges bore a "VI" on the headstamp while nitrocellulose-loaded cartridges were indicated with a "VIz".

The Japanese Army cartridges in 8 mm Nambu have no markings on the headstamp unlike the Japanese Navy cartridges.

Cartridges with the Roman numeral VIII on the headstamp are the Mark 8 round, specifically designed for use in Vickers machine guns.

In 1894 some Mark I cartridges were loaded with cordite (identified by a case cannelure and "C" headstamp) but it was found combustion was more efficient in a shorter case.

All ammunition currently produced at Radway Green is NATO certified i.e. bears the NATO roundel as part of the headstamp on the cartridge case surrounding the primer.

Rimfire ammunition is popular with ammunition cartridge collectors, who base much of the collectibility value of rimfire cartridges on the rarity of the stamped mark on the head of the cartridge (the headstamp).

By 1908, even Colt was chambering their new Police Positive and New Army revolvers in ".38 Colt Special", which was nothing more than the standard .38 Smith & Wesson Special with a different headstamp.

The headstamp on the casing can also help to identify the round as Raufoss and some common headstamps include, but not limited to: HXP89, WCC94, and FN91; or HXP, WCC, LC, or FN with different two-digit numbers as production year suffixes.