The term "20 Gauge" refers to a specific size of shotgun shell, commonly used in hunting and sport shooting. The gauge number indicates the diameter of the shotgun barrel; a 20-gauge shell has a smaller diameter than a 12-gauge shell, making it lighter and easier to handle. This makes it a popular choice for beginners and those who prefer less recoil. In addition to its use in shotguns, the 20-gauge shell is versatile, accommodating various types of ammunition, including birdshot, buckshot, and slugs. It is often favored for small game hunting and clay target shooting, providing a balance between power and control for shooters of all skill levels.