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The pre-war headstamp has the 1- or 2-letter code for the brass supplier of the cartridge case at 6 o'clock, the 2-digit year the cartridge case was produced at 12 o'clock, the lot number of the propellant at 9 o'clock, and the 2-digit year the finished cartridge was assembled at 3 o'clock. The brass suppliers or cartridge manufacturers would ...
A headstamp is the markings on the bottom of a cartridge case designed for a firearm.It usually tells who manufactured the case. If it is a civilian case it often also tells the caliber: if it is military, the year of manufacture is often added.
T3AUD = 240 Shells, Shotgun, 12 Gauge, No.8 Chilled Shot, Paper Cased, in 10-shell cartons. 12 cartons per M10 metal ammo can (120 shells). 2 × M10 ammo cans per M12 wooden crate. T3AWD = 360 Shells, Shotgun, 12 Gauge, No. 4 Chilled Shot , in 10-shell cartons, 12 cartons per M10 metal ammo can (120 shells). 3 × M10 ammo cans per M15 wooden crate.
The United States National Research Council released a report in 2008 that endorsed the investigation of microstamping as an alternative to ballistic markings.It had concluded that a national database of ballistic markings is unworkable and that there is not enough scientific evidence that, "every gun leaves microscopic marks on bullets and cartridge cases that are unique to that weapon and ...
US 6886284, Lizotte, Todd E., "Firearm microstamping and micromarking insert for stamping a firearm identification code and serial number into cartridge shell casings and projectiles", published 2005-05-03, assigned to Identification Dynamics LLC Belanger, Rene M., Daniel S. Jones, Sylvain Lagace, Michael McLean, and Homero A. Yasquez.
The main defining component of the cartridge is the case, which gives the cartridge its shape and serves as the integrating housing for other functional components, it acts as a container for the propellant powders and also serves as a protective shell against the elements; it attaches the projectile either at the front end of the cartridge ...
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In the 1990s, there were two databases that were formed for storage of pictures of shell casings and bullets in gun crimes. The first was the Drugfire system which was used by the FBI. The second, the IBIS (Integrated Ballistic Identification System) was created by Forensic Technology, Inc. and eventually bought by the Alcohol Tobacco and ...