fishdock.
You can have a gun sleeved down a gauge but not always. The barrels are cut off just in front of the barrel flats and the chambers are bored out with a new chamber sleve soldered in place with part of the sleve sticking out of the cut off area. New tubes are then welded onto the sleves slodered together etc.
The Teague system useses the original barrels and bores them out insatlling a full length sleve into the original barrels. This method is probably more accepted that the first as you can retain a set of damascus barrels and the guns origina look.
I have three English guns that were sleeved at Briley and I enjoy shooting all of them. I do use low pressure loads as the stocks on all three are 110 to 125 years old and I don't want any wood cracking with some heavy loads.
I am sure someone will have a lot more expertise than I do but I think I have teh basics.
Regards, Gordon
