Which type of shotgun slug is commonly used?

The Foster slug is a highly recognized and widely used type of shotgun slug, particularly for smoothbore shotguns. Designed by an American gunsmith named B.B. Foster in the 1930s, this slug features a hollowed-out base that allows for better aerodynamic stabilization during flight. This characteristic is essential as it helps maintain accuracy and consistency when the slug is fired.

Foster slugs are usually made of lead and have a design that allows for deformation upon impact, which can enhance terminal ballistics. Because of their ease of manufacture and effectiveness, they have been the standard choice for many hunters and shooters looking for a reliable slug to use in a variety of hunting scenarios.

Additionally, they are effective for self-defense and law enforcement applications, giving them a wide range of utility which contributes to their common usage compared to other slug types. Other slug options like Brenneke, sabot, and fin-stabilized slugs have their specific applications and advantages but are less prevalent in general shotgun use.