Everyone- Thanks for all the information.
Patriot USA - Your info is expecially helpful. Thanks.
nialmac - Thanks for the info on barrel fabrication. I guess you have a good point that "regulation" isn't quite the correct word in the context of mass produced SxSs since there is no shooting and subsequent adjusting done to the barrels' alignment. Maybe just "barrel convergence" is the best term?
BTW, I noticed that Champlin Firearms offers a double rifle barrel regulation service for $600 plus ammo. Anyone have any experience with this service? I wonder if Mr. Perodeau will also regulate SxSs if one were to buy a nice used SxS with a barrel convergence problem?
--shinbone