All of the pin guns I've seen have had 30" barrels both choked full. I presently have three of them. They're my favorite duck guns. I never take them in the field where others do not mistake them for Parker guns.
One of my three had pitted barrels. There was enough barrel thickness to warrant a back bore and polish. Steve Bertram has done that for me and opened the chokes .007 and .013. I'm expecting that one to be a dove killer!
A common bit of miss-information about the pin guns is that they were built on left over Baltimore Arms and Philadelphia Arms frames which also utilized the carriage bolt hinge pin. That has come from Michael McIntosh's Fox book, but has since been determined to be untrue.
For them to have been made for such a short period of time there sure seem to be a lot of them on the used gun market today. It surprises me that they do not seem to bring much of a premium compared to regular Sterlingworth guns...Geo
