I've got several Uberti revolvers, including open tops and conversions. Got one Colt SAA. Thinking of selling the Colt because of accuracy issues. The Colt's cylinder throats measure .457-.458, the Uberti's measure .454 and .455, both have .452 barrels. No matter what load I try my Uberti's are more accurate than my colt. Now, the Uberti's have had to have some tuning done and the colt no work and it's still got a crisper feel than the Uberti's, not to mention the fit and finish is way above the Uberti's. That said I won't have a gun that won't shoot straight, no matter how nice it looks.
I'd say if colt would get there chamber throat and barrel ID's a little closer to what they should be then it'd be a real nice revolver to own. Till then I'll stick with something I can hit with.