It’s not the dovetail. It’s the sight.
Personally I only run sights with set screws on fighting guns. I put a small dot of thin leather down in the hole and then tighten down the set screw. A trick I learned some time ago. Never loctite a small set screw. In a pinch I’ve cut small piece of wood from a q-tip or toothpick with good results when no leather is around.
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