Re the "reversed" chokes (front trigger fires the R barrel with tighter choke than the left): However logical that might seem for driven birds, I don't think it was that common. I have a catalog from Christie's, back when they were still in the gun business, that includes a dozen or more pairs of guns. If someone bought a pair, chances were very good they were going to be used for driven birds. Yet not a single gun of all those listed had reversed chokes. Of course one could order a gun any way they desired, but having the chokes "backwards" doesn't appear to have been at all typical for driven bird guns.