In its original form, it was common issue to soldiers from the 16th century to the 18th century, and contained either pre-packed chargers, small containers of wood, metal or cloth containing the measured amount of gunpowder for a single shot with a muzzle-loading muskets or other guns, or early forms of cartridges also containing a ball. It might also carry other accessories for shooting, or grenades. Any bag worn in the same style may also be described as a bandolier bag; equally ammunition holding pocketed belts worn round the waist may also be called bandoliers.
A somewhat different form of the bandolier came into use in the 19th century when it held more modern types of cased cartridges and hand grenades. Bandoliers are now less common due to the use of magazines and belt-fed firearms, though extra ammunition belts are often carried around the body like a bandolier. They are, however, still often used with shotguns, as shotgun shells can easily be stored in traditionally-designed bandoliers. In fact, some aftermarket shotgun slings are designed in a similar fashion to traditional bandoliers, albeit with a far more limited capacity.
Another modern use of a bandolier is in the automatic rifleman of a military fireteam. Since a squad automatic weapon is often belt-fed, an automatic rifleman will carry an extra belt on his person; either in a separate compartment or slung over the chest in a bandolier fashion.
The bandolier was used to keep ammunition off a soldier's hips, as carrying too much weight on the hips can constrain movement and cause difficulty in retrieving the ammunition.
In World War I and World War II, bandoliers were issued primarily to riflemen. They were made of cloth, stitched into pockets which held clips of rifle ammunition. Today, bandoliers are commonly used to carry multiple grenade rounds. In civilian use, bandoliers are often worn by hunters and recreational shooters using shotguns.
Today bandoliers see widespread use with sport shooters and hunters alike, as well as limited use in military conflicts.