Interesting to see, at 12, his .22 Browning Model B take-down has the scope secured to the barrel rather than the action.
I had one of similar vintage (not as fancy a grade) and had endless trouble getting it to hold its zero with a scope.
Eventually the penny dropped (as did the scope) when a friend was shooting it and the scope hopped off the factory “grooved” receiver.
It was less a dovetail, more like two parallel walls, and the retention could not cope with the sharp rap of the bolt cycling just below.
I stuck a peep sight on the wrist and it worked fine until I replaced it with the left handed first model T-Bolt that has given me good service for over 50 years.