Which type of shotgun slug is known for having a smooth body?

The type of shotgun slug known for having a smooth body is the Foster slug. This design typically features a cylindrical shape that is smooth and often made from lead or other materials. The smooth body of the Foster slug allows it to be loaded easily into a standard shotgun barrel and provides a relatively stable flight path once fired, despite its lack of fins or stabilization features.

Foster slugs are particularly distinguished by their ability to be used in smoothbore shotguns without detrimental effects on accuracy, as the shape of the slug helps it to stabilize in flight. Their design allows them to achieve good terminal ballistics upon impact, making them popular for hunting and self-defense.

In contrast, other slug designs like the Brenneke and sabot slugs have different characteristics. The Brenneke slug typically has ridges or a more complex body design for better stabilization and flight characteristics. Sabot slugs, on the other hand, are often encased in a plastic sabot to provide more stabilization and are optimized for rifled barrels. Fin-stabilized slugs feature fins or protrusions that stabilize their flight but are different from the smooth, simple design of the Foster slug.