Shotgun shells is an item in the ammo category used as ammunition in Factorio; it occupies an ammo subcategory and stacks up to 100 per inventory slot, and is consumed by any weapon or turret that accepts shotgun-shell type ammo. It functions solely as an ammo item (no additional data provided) and is handled by the game's ammunition and inventory systems for reloading and consumption when firing weapons that require shotgun shells.