well, I train shooting around 500-800 shots a week with my Perazzi and after 100.000 shots through my 1972made Perazzi I have never seen a failure of the shotgun mechanism itself. The same for about 10 guys with Perazzis in my club.

However, I have seen one Perazzi trigger group that doubled regularly owned by a friend (it tends to happen in those trigger groups with a selective mechanism - so yes, you could switch from soft to solid...).

But another common failure is different: the shooter shoots the first shot and does not take the finger all the way back and the second shot doesnt fire. In a split second he can ease the finger and shoot, but mental disabilities common in this situation could be a problem...

Both my double have double triguers... and I have on Beretta shotgun with them which I like to use before our buffalo hunts around here...