Generally, you can fire a rifled slug thru any barrel and choke except for the maybe the tightest "turkey" chokes. Some sabot slugs are not advised for use in rifled choke tube. If I remember correctly, Remington had a warning about only using their Copper Solid slugs in rifled barrel and that they should not be used in the standard Rem-Choke rifled tube. When in doubt, go with the manufacturer's recommendations...slug and/or gun.