Take a look at this slow-motion video starting at ~7:20. The cartridge definitely hits the rear receiver bridge. And if there had been only a slight bit more rotation of the cartridge, the mouth of the cartridge would have hit it.
Nothing has changed. The mouth of the shell casing never remotely comes near striking the rear receiver bridge. Hitting a flat surface is not going to create a dent like what is on CE 543.
It is a physical impossibility for the shell to flip beyond a 180 degrees that would be needed to overcome the shell body and then strike anything on the receiver bridge that can put a dent in the mouth of the shell as described by the AI.
The HSCA test‑fired dent was “in at the top” and sloped downward — a downward‑angled inward crush — whereas CE 543’s dent is a compound deformation with an inward dimple and an outward flare.
What is it about this that makes you want to enter the Twilight Zone in an attempt to create a bizarre scenario? The HSCA did not duplicate the dent in the CE 543 shell casing. Nobody has. It has a dimple in the middle of it and the top lip is flared back.
Try loading an empty shell casing into the rifle. It does not go smoothly and the lip hangs up.