Worn Hinge Pin?

[Dean Romig]

Tightening up a Parker by the forend method involves adding material to the rear of the forend lug on the barrels and filing for a fine tight fit. This process effectively pulls the hook tighter against the hinge pin but also pulls the barrels away from the breech face and as the gun wears more at the hinge the barrels become more and more "off the face".
I would recommend sending the gun to a shop that will properly add material to the hook and finely fit the barrels as they were originally done in Meriden.... then the forend will have to be re-fit.