If you feel like wasting money and shooting sabots out of a smoothbore I would highly suggest using an IC or more open choke. The fins on the rifled slugs are not there to impart any spin on the slug, this is a myth. The fins are there to crush as the slug goes through the constriction of the choke.

A sabot has a solid plastic shell with a lead slug or jacketed bullet inside of it and is normally the size of the full bore barrel for that ga. Which means when it gets to the restriction at the end of a smoothbore barrel there is nothing to collapse on the projectile. I can't imagine this is a good thing. Will it blow the end of your barrel off? Probably not but I would not risk it with the price of even a cheap shotgun.

And even if it doesn't hurt anything, like the others said the accuracy would be very poor and not worth the cost of even the cheapest sabot slugs. Especially when it may shoot twice as well with slugs that cost 2 or 3 dollars a box.

Paul