Can you shoot a rifled slug through a smooth bore barrel with a smooth choke tube on the end?

Rifled slugs are made of soft lead purposely for use in smooth bore shotguns. Actually the "rifling" on the slug deforms to allow the slug to pass through the choke in the bore. If your firearm is of modern manufacture and in good condition it should be safe. Of course it goes without saying that you must use the appropriate type (i.e 2-3/4", 3", etc.) and gauge (410, 20, 12 etc.) of ammunition for which your firearn was designed. If in doubt, have a reputable gunsmith check it out for you.