This is what happens with a model 29 if real heavy boolits are shot. Inertia of the cylinder lock will make it stay forward and unlock the cylinder. The hammer will also bounce against the primer when the trigger is still back causing a double strike on the primer.
The unlocking pin in the center of the cylinder will get peened on the front and hang up in the hole so the cylinder gets hard to open.
Even though the gun can take very high pressures, it HATES recoil.