What does the term "shot size number" indicate in shotshells?

The term "shot size number" refers specifically to the diameter of the shot pellets used in shotshells. Shot size is an important aspect of shotgun ammunition because it determines the size of the individual pellets that are released when the shell is fired. Different hunting situations require different shot sizes; for instance, larger pellets may be needed for larger game, while smaller pellets are suitable for birds or smaller animals.

Understanding the relationship between shot size and the intended use is crucial for hunters to make informed decisions about their ammunition. While the other options mention aspects like speed, weight, or quantity of pellets, they do not accurately define what shot size number represents. Focusing on the diameter allows hunters to select appropriate loads for their specific hunting needs, thereby enhancing their effectiveness and ethical hunting practices.