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In reply to the discussion: Why is it so important for some people that the Kennedy assassination [View all]Spider Jerusalem
(21,786 posts)The elapsed time between the two shots that hit was estimated as 5.6 seconds. This is well within the capability of even an average marksman.
http://www.jfk-online.com/jfk100timing.html
http://www.jfk-online.com/jfk100shot6.html
CE399? Not pristine.

Bullet trajectory? Lines up perfectly with the path of the bullet from the sixth-floor window based on Kennedy's position at the time he was hit, the location of the entry wound in his upper back and the exit wound in his throat; Connally was sitting six inches below and three inches to the left and was turned to his right when he was struck--by a tumbling bullet; no "bullet wipe" on the entry wound, which was oblate, indicating that the bullet was tumbling, which means it had already hit something: Kennedy. Bullet deflects along a rib and breaks it, exits under the nipple, strikes his wrist...at a much lower velocity.
Here is a 6.5mm Carcano round, loaded with a reduced charge of propellant, fired through the wrist of a cadaver at approximately 1100fps:

See also John Lattimer's tests of the single bullet hypothesis, which concluded that yes, in fact, a single bullet could cause all those wounds while exhibiting the same sort of deformation as CE399 (which was missing up to nearly 3 grains of weight compared to an intact and undeformed bullet, see here.