The FMJ bullet entered at the level of C7. It did not smash through C7. It exited at the level of C7.
Didn't smash thru C7? According to your beloved x-ray it did.
According to your beloved pitch angle it did.
So then how did it exit thru a small hole and carry on in a straight line to smash thru more bone then show up on the wrong gurney with no blood, tissue or bone on it and barely any deformation or loss of material?
So you claim that the MB entered at C7 and exited at C7 thru JFK's neck at a 17 deg yaw angle. Re-enactment please (with lasers).