Originally Posted by BrentD, Prof
Rifle liners are held in place with Locktite. Soldering is almost never done in the last couple of decades due to the improvement in adhesives. Shotgun liners should be even easier to glue in place.

You might want to read about how a good gunsmith does a similar repair operation. It would seem this repair was done fairly recently ( less than a couple decades ago).

https://vicknairgunsmithing.blogspot.com/2022/12/correcting-excess-headspace-in-parker.html


Best,
Ted