A friend had a gun shop for reinactors,mostly. She sold only black powder guns. She sold a UBERTI Navy revolver to a guy who had never fired a gun. On his first shot,the barrel and cylinder took off about 50 feet down the road,leaving him holding the handle and frame of the gun.
She brought me the gun to look at. The cylinder pin had sheared off flush with the recoil shield. The fracture in the steel cylinder pin was very strange. It's structure looked like coarse grains of sugar,about 1/32" across. Obviously some kind of defect in the metal. Very shiny grains,too,not dull gray like a fracture usually is. The shooter was not hurt,at least.
I don't know how some of these Italian guns get away with having proof marks on them,when they obviously have never been test fired. My friend and i ordered a pair of Schofield revolvers from Cimmaron(a brand I will NEVER buy again!!). Jon took his gun and loaded it. He snapped it 6 times,but it never went off. The cylinder was so off that the firing pin was missing the anvil in the primer by up to 1/16". I looked at mine down the barrel(empty!). It was about the same. 1 chamber lined up. The rest were way off.
We got the Cimarron guy on the phone,and the liar claimed he had stuck a range rod down both guns. That was not possible. After some argument,we did get a refund. But,I do not like blatant liars.
Some time afterwards,I found a Uberti and a Pedersoli at a gun show. Both had perfectly lined up cylinders. I bought the Uberti,and it shoots better than my real Colt single actions. I will not buy any more Italian guns that I am not able to personally inspect first.
P.S.,both Cimmarons had proof marks,but they obviously had never been proofed.