Types
The earliest shotgun slugs were just lead balls, of just under the bore diameter, allowing them to pass through the barrel. Often called "pumpkin balls" or pumpkin nuts, these slugs showed very poor accuracy, and were only effective at the very close ranges where they could be relied on to hit the target in a vital area. Later types of slugs, such as the Brenneke design, use a weight-based design and rifling-like fins to provide stability and the ability to easily compress and pass through a choked barrel. These can be fired through a smoothbore barrel with reasonable accuracy, and significantly extend the effective range of the shotgun slug. The latest improvement is the saboted slug, fired from a rifled shotgun barrel. The saboted slug and rifled barrel combination provides even greater accuracy than the rifled slugs, and the slugs themselves are more aerodynamic, providing more range and a flatter trajectory.
Read more about this topic: Shotgun Slug
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