This term refers to ammunition cartridges packaged in easily opened, sealed metal containers, often of surplus military origin. The numeric designation signifies a cartridge with a bullet diameter of 7.63 millimeters and a case length of 39 millimeters, a common round used in various firearms globally. These containers, colloquially known as “spam cans,” typically hold hundreds of rounds, making them a popular choice for high-volume shooting activities or long-term storage.
The availability of surplus ammunition in this format offers shooters an economical option for acquiring large quantities of cartridges. This is particularly relevant for training, practice, and competitive shooting disciplines where ammunition consumption is significant. Historically, such packaging has been utilized by militaries worldwide for efficient transport and storage of ammunition, contributing to its widespread availability on the civilian market. The robust nature of the containers ensures the ammunition remains protected from the elements and other potential hazards.