I think the chrome trim dent could be compatible with a 567.
(a CE567 @ ~800fps)
Kellerman said that at the first shot JFK said -- "My God, I am hit". This is of course the shot that ricocheted off the signal arm guy rod (mast) at say pseudo Z105 (Holland said Z103). The ricochet gave us three lots of fragments. (1) The shower of small lead hit JFK in the back of the head, actually the right-hand-side of the back, koz he was looking right (Xrays). (2) The lead slug put a hole in the floor near the jump seats, & rattled around tween the driveshaft road & limo (photo)(FBI letter).. (3) The brass full metal jacket broke in two as usual (made in 2 halves), & ended up hitting carpet tween the jump seats (CE567 CE569).
Roselle & Scearce say first shot was at i think Z124 plus or minus (i think) 3 frames (ie Z121-Z127), based on reactions.
Hence reactions suggest that Z105 is 16-19 Z frames too early (& Z103 is 18-21 Z frames too early).
So, u are today saying that CE567 was probly from the headshot at Z313, & that CE567 after outshoot made the dent.
I could mention say 10 ballistic facts that each kill that theory, & say 10 non-ballistic facts.
What is needed is someone with a good brain (ie u) to test a 223 hitting a (proper) model of the chrome trim etc.
The critical thing is whether the 223 would make a hole instead of a dent.
The dent was made by the penultimate shot (at about Z309) of Hickey's accidental auto burst of at least 4 shots (Z313 being the last shot).
This shot was nearly parallel to the Elm St pavement, from say 27 ft (muzzle of AR15 to dent).
First contact with chrome was on the midline of the chrome (ie on the crease at midline).
The initial lead splatter was partly down & forward (as per the angle of the bottom half of the face of the chrome below the midline), damaging the rear vision mirror.
Then, when the chrome dent started to develop, the splatter was 360deg & backwards.
I could help with needed details. Nobody else around here has a clue.