Hey Coach!! Put Me In
I have to agree with Dragoon (Lightning gonna strike me). Finding the ONE Uberti with correct Arbor fit is akin to finding the Holy Grail. The additional problem is an incorrect "Interference" fit of the Barrel/Arbor. The interference is the result of sloppy machine work on the Bore in the lug. Cleaning up that bore usually lets the barrel and Arbor slide together easily. If turned to one side and tapped with a mallet, the barrel WILL move to the rear. This rearward movement is also evident when the wedge is installed BEFORE the fit is corrected. As Mike said, the Barrel Breach will
back right up to the Cylinder Face, tying everything up
Actually measuring or trying to measure "now much" correction is needed is like chasing the wind. No two Uberti Open Top design guns are exactly the same. In all the guns I worked on, I never bothered to "measure" as I just fix'd the problem. There is a real quick and dirty and cheap seats way to get a real close fit. Drop a #10 split washer (I prefer Stainless) down the bore. It will seat in the drill depression at the bottom, then put the gun together and fit the wedge. Just don't forget the little washer when you clean the gun. This will work 95% of the time. I also like to clean up the bottom of the bore so it is a slip fit with the Arbor.
There are some aspects to setting up these guns that The Dragoon and I disagree on. It doesn't mean either of us are "wrong." We just get to the same finish line via a slightly different road.
Another Mike