Hi tljack, there is a simple workaround to the Uberti short arbor issue. Get a cheap set of automotive leaf gauges. Decide on the barrel/cylinder gap desired. I like 0.005" for BP. Go to half cock and insert the leaf in between the barrel and cylinder. Incert the desired gap gauge. Hammer the wedge on hard. Then remove the gauge. That will keep the gap at a correct value for the remainder of the shoot. If you remove the barrel, you need to repeat this process. Having said that, it is only a workaround to consistent gap that keeps poi on target the same shot to shot, reload to reload. The perfect fix is to fix the short arbor. I was using epoxy on brass buttons filed to a correct gap, but have moved to adding a threaded set screw to the end of the arbor. That method allows simply setting any gap desired, even after many shooting outings. Want to change the gap? Turn the set screw.
All Uberti revolvers have short arbors. Ultimately, fixing the Uberti short arbor is the desirable path.
Regards,
Richard