Stan,that's the right place to send it.
We have some gunsmiths here, and I hope they chime in. But my first thought would run along the same lines as Ted's. The gun has now had a bunch of use, and you've used the R barrel more than the L. Uneven wear on either the hinge pin or the lump. The BSS has a well-deserved reputation for strength, but it does not have a 3rd fastener. (And on well-made guns, those often aren't necessary.) But I'm thinking that your chances of uneven wear on one side might be greater because you don't have something like a Greener crossbolt or some kind of top hook or hidden 3rd fastener that engages the breach face.
But entirely possible some gunsmith will come along and tell me I'm all wet . . . in which case I will have learned something!
