Rifled barrel, and rifled slug does not make much sense, unless they like that shooting full bore slugs instead of saboted that makes the bullet width less. Sound to me they are tryign to get around the high dollar of sabot slugs.

Thier accuracy will hurt, and BC shoots down. But if thier shots are all under 40 or 50yards, doesn't make much difference.

Bottom like is sure lead fouling will be a problem, but hey clean it out. And with todays modern sabots, I believe they perform much better than a slug.