According to the evidence, all three shots struck either JFK or JBC. None missed................
I am not sure what your definition of evidence is.
I responded to your claim that all three shots found their mark. There's no evidence for that. In fact, it would be impossible. Less than a second passes between the time JFK is blocked by the Stemmons Freeway sign and when JBC is hit.
1) What the evidence shows is that JFK shows no signs of distress before the Stemmons Freeway Sign blocks him form the view of Zapruder at frame 208.
2) What the evidence shows is that by Frame 224 JBC suit lapel makes a rapid move forward indicating a bullet has passed through his body.
3) What the evidence shows is that by Frame 225 JFK is reacting to the automatic reflex known as the Thorburn position.
4) What the evidence shows is that the third shot hit JFK in the head and that either the first or second shot hit both JFK and JBC.
I have no problem with a claim that the second shot missed as LHO could still have had enough time to have fired a third shot, let's say first shot Frame 223, second shot missed around frame 250 (corresponds with Altgens testimony as to when he heard the first shot), third shot hit Frame 312. It's entirely possible, even probable, that Oswald was only using the iron sight for the first two shots and that would decrease the amount of time it takes to reload and fire by about 3/4 to a full second (12-18 frames). For the third and fatal head shot Oswald could have reaquired the target and fired in 3.3 seconds (62 frames).
While I agree there's earwitness testimony that places the first shot later than frame 186 I disagree there's no evidence of a shot before frame 186. The best evidence is the combination of the Zapruder film and the testimony of several witnesses plus Rosemary Willis can be seen on the Zapruder film running beside the presidential limo until she begins to slow down and turn her head to the left at frame 161. She later gave an interview in which she stated her reaction was due to a loud noise. This is in part why I agree with Gerald Posner that the sequence of shots were as follows;
1) Frame 160 missed
2) Frame 223 SB C-399 passes through JFK and JBC until it falls from his thigh and lands inside the pant cuff.
3) Frame 312 Fatal Head Shot
There is no mystery to the location of the first shot. The first shot was fired while the limo was between where Jean Newman was standing and the Chisms who were located at the corner of the Stemmons Freeway sign. The first shot occurred directly in front of Calvery, Hicks, Reed, and Westbrook, the secretaries from the TSBD, who were interviewed by the FBI in February and March of 1964. Both the Chisms and Jean Newman stated there was just two shots. The secretaries never were asked. Woodward places the first shot after Z204 and JBC places the first shot when he is adjacent to the Chisms.
John Chism : "And just as he got just about in front of me, he turned and waved at the crowd on this side of the street, the right side; at this point I heard what sounded like one shot,"
Jean Newman : "The motorcade had just passed me when I heard that I thought was a firecracker at first, and the President had just passed me, because after he had just passed, there was a loud report"
Gloria Calvery : "The car he was in was almost directly in front of where I was Standing when I heard the first shot."
Karan Hicks : "The car he was in was almost directly in front Of whero I was standing when I heard the first explosion. I did not immediately recognize this sound as a gunshot"
Karen Westbrook : "The car he was in was almost directly in front of where I was standing when I heard the first explosion. I did not immediately recognize this sound as a gun shot ."
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Woodward said the earsplitting noise happened after JFK turned forward and not before. JFK does not turn forward until Z204+
Mary Woodward
"After acknowledging our cheers, he [JFK] faced forward again and suddenly there was a horrible, ear-splitting noise coming from behind us and a little to the right.
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The only children on the right side of the street was first the Chisms and then the Newmans.
Mr. SPECTER. When you turned to your right. Governor Connally, immediately after you heard the first shot. what did you see on that occasion?
Governor CONNALLY. Nothing of any significance except just people out on the grass slope. I didn't see anything that was out of the ordinary, just saw men, women, and children.