Fn 9mm head stamp8/13/2023 It is rare for commercial ammunition to include the date of manufacture and/or batch number. Occasionally, other information such as bullet type, case material and priming compound, that is, ' Staynless' is also impressed on the base. In general, however, the headstamp found on commercial ammunition will only show the manufacturer and calibre. In such cases, it can be extremely difficult to find the original manufacturer of the cartridge case. The headstamp is also sometimes used as a medium for advertising, and a gun manufacturer, such as Holland and Holland, can have ammunition supplied with its own brand name impressed on the base. This will aid the identification of the separate components, but it is not nowadays a common practice. Occasionally, the base of the bullet may be marked to indicate its origin, and in some cases, the primer itself can be marked to show its origin as well. Many cartridge case manufacturers sell their cases to small companies who load them to their own specifications, and it is not unusual to find that the bullet, cartridge case, propellant and primer all have different sources. This information only relates, however, to the cartridge case and does not necessarily indicate that the other components, that is, primer, bullet and propel-lant, were of the same origin as the case. From these impressions, one can, depending on the type of ammunition and its origin, determine the manufacturer, calibre, type, date of manufacture, batch number, case material, and so on. They can be in any language, numbering system or can relate to any calendar. Systems of headstamp markings are used worldwide ![]() ![]() The mark can consist of numbers, letters, trademarks, figures or any combination of these. A cartridge headstamp is a mark, or series of marks impressed, or sometimes embossed, on the head of the cartridge case during its manufacture.
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