What choke is best used when shooting rifled slugs?

There is no choke for a shotgun "slug", however if you are firing slugs from your shotgun you should get a slug barrel, or cantilever barrel if your shotgun can alternate barrels. If your shotgun cannot do that then you must purchase an alternate gun that is for slugs or get a shotgun that can alternate barrels like i said. If you want to shoot accurately. Technically otherwise you aren't supposed to fire a slug from a field barrel and in some states it is illegal because of the inaccuracy it may wound a deer. ----- For many many years it has been recommended that a cylinder choke or an improved cylinder choke in a smoothbore shotgun barrel is best for slug accuracy. It is not recommended that one fire slugs through full chokes. --230RN