Keith,
Is it possible that the relatively small and weak uderbolt spring of the Citori in the video has enough power to rebolt the lock up against the forces of the barrels being cammed open as well as their weight?
Personally I think not. I have a Citori and know how much the barrels weigh!
What actually happens to the shotgun action during firing is not at all clear. In the past I asked the super slo motion guys to do a clip of the action but they seem bent on the muzzle end which is visually more exciting.
One thought to ponder, anyone ever heard of a Jones underlever being cammed open? That would be a revealing as to what forces are acting and how on a SXS action during firing. My suspicion is that the Jones action would not cam open because the inertia of the underlever does not allow it, but I am open to any proof anyone might offer to the contrary.
It is also useful to include strong self opening actions in our thoughts, ie Purdey, Holland, and the added camming power during firing.
