Any "rifled" slug will work...provided the choke on the end of the barrel isn't too restrictive. If it's too tight - bad juju happens.
I'm not familiar enough with shotgun chokes to know which are OK and which are no-go. (Yes, even if no removable choke, some shotguns will have a narrowing at the muzzle.)
Brenneke slugs are about the best I've ever shot! Saw some test someone did on YouTube and they have some great penetration compared to the others they were testing.
I'm a dimwit. I meant to say with Brenneke slugs.I used to have a High Standard riot gun with the fixed barrel. I drilled and tapped it for a Weaver base and put a K2.5 scope on it. It would shoot 2-3 inch groups at 50 yds. any time. That's definitely minute-of-deer.
The guys at GM told me...
Anyone try the Rem choke rifled choke tube?