Some may remember I had a problem with some cases jamming on extraction. After much trial and error I finally kept separate a few of the tight cases and measured them with a micrometer (it was a bit iffy as the cases were a bit out-of-round from bouncing on a concrete floor). There seemed to be some variation in measurements at the rim end and the mouth end, so I pulled the barrel and had a fellow member who does gunsmithing have a look at the chamber. He measured a variation of 2.5 thou. between the ends of the chamber! The rifling end of the chamber was 2.5 thou. bigger than just inside the breech end!! No wonder some of the cases were tight. He ran a boring bar down, skimming just enough to make it uniform.
Guess it wasn't a good day at the Uberti factory when mine was made .