On that pistol....
....I find in practice that the setting of the screw iss not all that critical. For me it is enough to set the screw so as to hold the wedge in the barrel when it is pulled out for barrel removal. Kind of keeps the wedge from falling all the way out.
You can back the wedge out slightly and your cylinder should loosen up.
The wedge with "seat" eventually. Some call the wedge a consumable part. I guess that is accurate.
On the few new pistols I have bought I found essentially what you are seeing. The wedge seats such that the tip is about flush with the surface of the barrel. Then eventually it wears to the point where it is protruding above the surface of the barrel.
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