That's kind of the dilemma, isn't it Ted.

Sooner or later you either need to use non-toxic, or OTC shells.

That eliminates a whole bunch of old American (and foreign) shotguns.
If it just sits in the closet while you "wish" you were pheasant hunting, then it doesn't matter so much.

But if you are actually going to do it on public land in wild places, the list gets pretty small.

Out there doing it best I can.