Since we're discussing 20 ga. Citoris, I have an amusing anecdote about one. One showed up in the shop last week with "Not firing" on the repair tag. Naturally, I attempt to test fire guns labeled as such first. Fired it with 2 pheasant loads. Worked perfectly. Fired it with 2 AA Trap loads. Again, works perfectly. Fired it from the hip, trap loads, works perfectly. Sometimes inertia guns won't fire the second one in that test. Fired 2 more trap loads, holding the gun very loosely from the hip, first fires, second does not. The gun is working exactly as it should. Inspected the firing pins, they look brand new.
As has been mentioned, I've seen more problems with 725 triggers over Citori triggers.