I would not definitely not do it...I don't think there would be any exceptions to that rule and I don''t think that would work(Old style Remington Forster) slug it may end up removing your variable choke. I would contact Mossberg and ask them that question they would have more tech info on that choke. I know growing up PolyChokes were all the range but best of my knowledge only buckshot and not slugs were fired out of it.