7.62 mm caliber

Historically, this class of cartridge was commonly known as .30 caliber, the equivalent in Imperial and United States Customary measures.

The measurement equals 0.30 inches or three decimal lines, written .3″ and read as three-line.

[1] The 7.62 mm designation refers to the internal diameter of the barrel at the lands (the raised helical ridges in rifled gun barrels).

The actual bullet caliber is often 7.82 mm (0.308 in), although Soviet weapons commonly use a 7.91 mm (0.311 in) bullet, as do older British (.303 British) and Japanese (7.7×58mm Arisaka) cartridges.

Many pistol cartridges are in this caliber; the most common are: Some of the revolver cartridges in this caliber are: The most common and historical rifle cartridges in this caliber are: