I have lived in and around Dallas since 1974 when we moved here from California. The road descends and twists left and then right just before the railroad tracks and the sign to I-30 (RL Thornton Fwy.)
I also know how the Carcano operates and cycles. And to single feed or even have a magazine and eject and leave the casings in a row eats into the available time. So, at first, I thought, how could he possibly shoot three times and connect so much? Having seen that street and thinking the driver hit the gas made it seem unlikely. Then, of course, there is the evidence from others that the limo nearly stopped, which gives you just enough time to really settle into a shot. Whether we like to believe it or not, Gunney Swagger's leading shots in the "Shooter" are not always that successful.
So, then came the ventilating of the skull and the brain matter all over Jackie Kennedy and the back of the limo and the SS agent climbing aboard. At first, it was easy to believe James Files, a mob hit man who admitted to making the kill shot from the grassy knoll with a Remington Fireball, which is a .22 pistol with a 10 inch barrel and it can reach farther than the average gun fight. And that he was shooting a frangible round that a friend made for him. Problem is, no one can back this story up. Files spent a long time in prison for running a car chop shop.
Also, the head jerking back. Any meat target I have ever seen shot did not rock back like that, ever. Then, I realized, that could be an autonomic reaction. The body acts weird all the time. And that means that a shot from behind could enter shallow enough and blow the front chunk off like in the film. However, that requires a different angle of shot than LHO's angle. And that gets us back to square one. And simply repeating the Warren Commission report doesn't make it true. This should have been a DPD or even a Texas Ranger investigation all the way.