A pellet gun is an air gun that shoots non-spherical projectiles called pellets). Pellets are designed to be shot from an air gun and are made of lead or alloy metals. Pellet guns come in both long gun (air rifle) and handgun (air pistol) forms. They are used for various purposes, including target shooting, plinking, hunting small game, pest control, and sport shooting. Pellet guns are generally considered to be more accurate than BB guns due to their rifled barrels and aerodynamic pellet shapes. There are four main types of pellet guns that vary based on power source: pump pneumatic, spring or gas piston, pre-charged pneumatic (PCP), and CO2-powered. Pellets come in four main sizes, listed from smallest to largest: .177, .20, .22, and .25. Different pellet gun models and their users may prefer one pellet size over another. Pellets also come in different shapes, including diabolo-shaped pellets, spherical shots called BBs, and cylindro-conoidal-shaped "slug" pellets). Pellet guns can shoot a predictable and precise trajectory, and beginner pellet gun models can shoot a distance of 50-100 yards with accuracy, while higher-power models are able to accurately shoot much further.