Stan after 50 years in the English gun trade that includes years in Birmingham building new guns and years involved with sleeving I think I have little more insight into the construction of double gun barrels than some .
We may differ on what you on your side of the pond call regulation but on this side it is as I previously stated .
A pair of barrels were built taking into consideration the centers of the action at the breech then were brought to together at the muzzle . A Gun maker would have the same centers on the action regardless of the barrel length , be it 25" or 30 "so that alone should tell you something .
Apart from being paralleled that was all the barrel maker considered .
You can believe what you like and I dont really care , all I try to do is to set the record straight and correct misinformation when I see it .
