So it sounds like it is on face, but just loose??? I take it there is some up and down movement? This would indicate bolt bite wear. Your gun is likley an earlier gun which does not have the hardened wear plate in it.
The Easiest way of fixing this is first to simply swap out the locking bolt with one that may be a little bit biggeras to compensate for the wear. But the average person does not have additional parts to be able to work with in doing this.
The next and more involved option would be to rework the bolt or the bite (by welding) in order to tighten back up. Or a hardened wear plate could be installed like Parker used to do.
If the gun is off face or has substantial side to side wear, then that is caused by excessive wear at the hinge pin area. This would be remedied by adding material to the barrel hook (by welding) and then refitting the barrels. This is very labor intensive. The easy fix for this would be to put a piece of thin shim stock on the foll joint to take up the wear.
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B. Dudley
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