Yeah, and it is usually from people who never have done it because they were told by someone else not to so then they pass on that information. Trust me, I'm on the internet lol. No, but serious though, I have run almost every type of slug through my modified choke and I have had zero issues with it. There has been no damage whatsoever to the choke or barrel and feeding has been perfect as well as accuracy. To be honest I can not think of a slug you can't shoot through a modified choke. Maybe one of the Hornady sabot slugs? I have not tried those.