I've had a lot of experience in the last few years with Uberti revolvers. Very occasionally, you get lucky and find one that doesn't need much work. Those are the rare exception to the rule. Uberti's tolerances are loose, metallurgy is poor, and they do almost no finishing of the parts. The internals are extremely rough. There are casting and tool marks everywhere -- even across the face of springs, which is a huge problem because they act as stress risers and cause premature spring failure. Uberti hand springs are notoriously weak -- so weak that any real CAS competitor using Ubertis either replaces them with custom springs or keeps a couple of spares on hand for the inevitable hand spring failure in the middle of a match. The main springs last a little longer (5-10,000 rounds, typically), but still nowhere near as long as you'd get from a quality flat spring, and maybe 1% of the life of a Ruger coil spring.
Because the internals of the Uberti revolvers are so rough, and friction is so high, Uberti has to use heavy springs to make the guns operate at all. Those heavy springs, of course, make the gun less pleasant to shoot, and make it wear out quicker. Lots of people think that a heavy-hammered and heavy-triggered Uberti can be smoothed up just by dropping in aftermarket springs from someone like Wolff, but they quickly learn that with the lighter springs the gun won't work reliably. The lighter springs just don't have the oomph to overcome the drag caused by poorly fitted and rough internals and slots in the receiver.
The last few new Ubertis I've inspected also have rear barrel faces that weren't square, cylinder gaps that were undersize, visible tool marks in the miscut forcing cones, and timing that was off.
Uberti may have made some nice guns at one time, and they may still get lucky and ship an occasional good one, but it's clear that their general MO is poor QC and no inspection.
Ubertis can still be made to work reasonably reliably, but they'll require the attention of a good 'smith to polish the internals and adjust the timing, and they should generally receive some better springs.
By contrast, a Ruger will work well and reliably right out of the box. A little attention from a 'smith won't hurt, and will often make them more pleasant to shoot, but they typically don't need it. And Ruger's better metallurgy (in both the frame and springs) and improved design means they will handle heavier loads and last a lot longer.