Well... thanks for the tips so far.

I had a 525 apart once to put a spring kit and firing pins in it. It didn't seem particularly rough, as opposed to my Grade 1 Superposed that is positively ugly inside.

The gun does not eject the top barrel as described above no matter the opening force. The top lever is as expected on a new gun.

The curious thing is how both ejectors trip if both barrels are fired.

It's unclear from just the diagram how the ejector trip rods are actuated.


"The price of good shotgunnery is constant practice" - Fred Kimble