While the specifics elude me, what I recall is that the three shots were fired very, very quickly. The likelyhood of hitting a small moving target at that range and speed is astonishingly small.
My Dad was pretty darn conservative, not at all a conspiracy theorist. Just not in him. He was also the best shot I have ever seen.
He called BS, but it really stuck in his throat.
That is what sealed it for me.
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A bit more, poking around I found that the MAXIMUM possible interval was 11.2 seconds for the three shots, given the first one missed. It takes 2.3 seconds (cited elsewhere) to work the action on Oswalds rifle. The interval between individual shots, was 4.9 to 6.3 seconds, with the longer interval between the first and second shot. So, shot 1 to 2 he had 4 seconds MAX to aim and fire, and 2 to 3 he had MAX 2.6 seconds to aim and fire. This is a bolt action rifle, so operating the action disturbs your whole aiming process pretty significantly. Not to mention that Oswald must have had a class A case of Buck Fever.
While one can concoct all kinds of exotic behavior about the bullet, the behavior of the shooter is more observable and more in question. So, for me, to discuss the bullet trajectory, you first need to accept a miracle, just to get to that point.
2¢
http://hnn.us/article/35445$this->bbcode_second_pass_quote('', 'B')uried deep in the supplementary volumes to the Warren Report is a reference to what the Commission staff labeled “Position A.” (26) It was defined as a moment that did not appear on the Zapruder film, but represented the “first point at which a person in the sixth floor window of the Book Building . . . could have gotten a shot at the president[‘s back] after the car had rounded the corner.” (27)According to our calculations, Oswald realized what the Warren Commission labeled "Position A," and squeezed off his first shot, just as the horizontal traffic pole fleetingly obscured the president's body at 1.4 seconds prior to Z 133. (28) A first shot at this juncture means that Oswald fired three shots in an elapsed time of approximately 11.2 seconds, with intervals of around 6.3 seconds and 4.9 seconds between the shots. (29) The Warren Commission might be faulted here, but only for failing to pursue an early insight to its logical conclusion, and neglecting to mention “Position A” in its final report. (30) - See more at:
http://hnn.us/article/35445#sthash.smrQqvBN.dpuf