I agree with Marcus, go to the LC Smith forum and you will get your answers. Even if the gun in question would be damascus pattern barrels, if the barrel wall thickness is enough you can shoot the gun using sensible shells. Not 3 1/4 dram 1 1/4 oz field loads (just an example). RST makes nice shells, so does Fiocchi and Clever that we use in our vintage SxS guns. Plenty of info on rolling your own shells too. Ballistic Products has the most extensive loading manual out there. Info can also be found on the collector association sites (Smith, Fox, Parker, Lefever, Double Gun Site, etc..)
Enjoy the ride with the vintage guns. You'll be hooked!!
In an age of universal lies, speaking the truth is a revolutionary act - George Orwell