A shotgun, also called a "scattergun," is a firearm designed to shoot a multitude of lead or steel balls of varying sizes, greatly increasing the weapon's hit potential. This makes it very effective at hunting game.[Fallout 2d20 1] However, the accuracy and power found at close range starts to diminish as the target gets farther away. Shotguns designed for the military's use are often called "combat shotguns."
The shotgun is a breach loading shotgun featured in Fallout Shelter that fires shell ammunition. Dealing a minimum of 9 damage per attack, it has the second highest damage output for a shotgun in the game.
↑Fallout 2d20 Rulebook p. 98: "Before the Great War, double-barrel shotguns were mainly used for hunting and home defense, and this has changed little. They are break-action and come in an either a side-by-side or over-and-under barrel configuration. Simple to make and maintain, these shotguns are seen frequently in the Commonwealth and the rest of the wasteland."