"Just fine as long as the choke tube is IC or bigger and they are rifled slugs. Don't use a very constricted barrel otherwise you will blow it up."
Sorry, that's completely wrong.
You can shoot any STANDARD birdshot, buckshot, or slugs through any STANDARD choke from Cylinder Bore, to Full.
Where things get "iffy" is when shooting slugs or large buckshot through MORE than Full specialty chokes.
One reason for the rifled "fins" on Foster-type rifled slugs is to allow the slug to compress when passing through tighter chokes.
Cheeseybacon
"I know the accuracy of shooting a slug through a smooth bore barrel is going to suck bigtime"
That's also WRONG.
Rifled slugs are DESIGNED specifically to be shot through smooth bores, and rifled slugs are VERY accurate.
It's not at all unusual for a smooth bore slug gun to shoot 3 to 4 inch groups at 100 yards.