This is an overview article, listing content appearing in multiple Fallout media. For information specific to a given game or TV series, consult the table on the right.
Two different real-life rifle cartridges designated "7.62mm" are used in the Fallout series. They are sometimes treated as interchangeable, as in Fallout Tactics.
The 7.62x51mm NATO cartridge consists of a bullet with a gilding metal jacket and a lead antimony slug. It is a boat tailed bullet (rear of bullet is tapered) and weighs 145 or 150 grains. The tip of the bullet is not colored. The base of the cartridge is stamped with the year of manufacture and a circle that has vertical and horizontal lines, sectioning it into quarters. Its spread (accuracy standard) for a 10-shot group is no more than 12 inches at 600 yards.
The 7.62x39mm is an intermediate cartridge of Soviet origin. It is most famous for being used by the AK-47 and its many clones.