12G slug ?

[JDL]

As long as you do not have a rifled barrel the cylinder barrel will be great.

 

[BigTimber]

My Benelli , M1, Super90, has a smooth bore and plain old, black iron, fixed, sights. Using rifled slugs at 50 yards, firing 3 shot groups, the slug holes consistently touch each other. That's good enough for me. I just use regular old Remington, 2 3/4" standard velocity slugs and don't much care how or why the rifled slugs work.

100%. If the good lord carried a shotgun it would be a Benelli M1 super 90. Amazing shotgun.

 

[MisterHappy]

I have not seen a foster or breneke slug with a "wad" like there is for lead shot. Theres ususally a wad spacer ...some have the wad attached to the base of the slug.

Wads come in may varieties - Shot cup, like for loose shot, or a felt/paper/whatever wad to make up the difference between the diameter of the projectile, and the bore. Slugs have a much looser fit than rifle ammo.

Sabot slugs' sabots serve the same purpose.