Lots of choices . Bismuth is a direct replacment for lead and can be used in about any shotgun made since the 30s safely. There is also a polimer tungston shot that can be used in"lead" bbls . Both are pricey at best. Briman is a mostly right if you stay in shot sizes of B or smaller and have a mod. or imp cyl. you shouldnt have a problem . A few years ago about the sane time as the Remington bbl settlement all the US manif. listed safe shot sizes and models w/sn lots that could not be used with steel shot . You ought to be able to get a steel bbl or a rem choke for a 100 or less .