Aluminum turbine slugs out of a shotgun is a pretty interesting concept.
See the experimental slugs go through the paces of testing.
This custom-made turbine slug is quite a work of art too.
Shooting a prototype .70 caliber aluminum shotgun slug can get pretty interesting.
These custom-made slugs were made on a CNC machine specifically to be launched from a shotgun. The rifling cut into the slug itself is meant to help stabilize it in flight to the target.
A variety of projectiles can be shot out of a shotgun. This all aluminum projectile just may become another selection that can be made in the future.