I don't think Uberti is putting out a .357 Mag. handgun incapable of shooting full-power factory level loads.

I can't speak to the older Uberti .44 Mags, but I believe they were beefed up from the regular Cattleman which chambered 45 Colt, etc. The new Uberti .44 Mag. looks to have a frame similar to the Super Blackhawk. I had an Uberti .44 Mag. several years back. It even had a brass frame. I believe I shot it with full-power loads but I'm not telling or recommending anybody else do it.