[Scorch]

Pumpkinballs are just rifled slugs. The reason they are called pumpkin balls is that the rifling on the slug makes them look kind of like a pumpkin. Foster type slugs are closer to the old style slugs, but the base wad is attached to the slug and stays with the slug in flight. If you cast your own slugs and do not attach the base wad to the slug, it would be like the rifled slug loads of 50 years ago. It also would not fly very accurately. The wad on the slug helps keep the slug flying point first, kind of like the feathers on a badminton bird.