Very few experts could make those series of shots in the time allotted. And they had the benefit of an accurate scope, which Oswald’s rifle do not have. It needed shims just to get it into the field of view.
The elapsed time for the three shots actually begins when the first shot is fired. Former Marine and WW II veteran, William Manchester: “Indeed, three (shots) could have been within the crucial time span. Afterward it was argued that this was impossible, since fewer than six seconds elapsed between the first shot and the third, and tests demonstrate that at least 2.3 seconds were required to operate the bolt on Oswald’s rifle. The arithmetic went: 2.3 + 2.3 + 2.3 = 6.9. It was a trick. A correct calculation would be as follows : the first shot is fired, 2.3 seconds pass; the second shot is fired, 2.3 seconds pass; the third shot is fired. Total elapsed time: 4.6 seconds.” Manchester also wrote (page 95 of The Death of a President): “A subsequent controversy developed over whether or not shots fired from the warehouse on November 22 had been difficult ones, and echoes of the dispute are heard today. Here the author must appear briefly as an expert witness. This writer has carefully examined the site in Dallas and once qualified as an Expert Rifleman on the U.S. Marine Corps range at Parris Island, S.C., firing the M-1 rifle, as Oswald did, from 500, 300, and 200 yards. From the sixth floor in the Book Depository Oswald would look down on a slowly drifting target less than ninety yards away, and his scope brought it within twenty-two yards. At that distance, with his training, he could scarcely have missed.” No matter, as someone has already posted people will believe what they want to. Three shots were fired, there were three spent shells, with all three shots distinctly heard by people on the fifth floor directly beneath the sniper’s roost. All evidence proves conclusively that those bullets were fired from the rifle found on the sixth floor to the exclusion of every other rifle on earth. It’s just not that complicated. And if there were shots from the grassy knoll (as suggested by that fool Oliver Stone) by an alleged gunman, ostensibly one of the Mafia’s finest, then how is it that firing at point-blank range he missed the entire car and everyone in it and that the bullet was never recovered? This stuff really gets silly after a while. Ditto, the magic bullet. That so called “magic bullet” is also absolutely absurd. The “single bullet theory” is correct and was formulated two months after the assassination. Jacob Cohen, writing in the June, 1992 issue of Commentary: “Now if the bullet found in the basement of Parkland Hospital next to Connally’s stretcher, fired from Oswald’s gun and missing the very lead found in Connally’s wrist, is not the one which struck Connally, how did it get next to Connally’s stretcher? Stone suggests that someone from Assassination Central was sent over to drop a spare bullet somewhere in the hospital. Why the basement? Why Connally’s stretcher and not Kennedy’s? How could it have known then that a bullet which ended in the soft flesh of Connally’s thigh needed to be placed with his stretcher in order to confirm a single-bullet theory which was not developed for another two months? And if this not the bullet that hit Connally, what happened to the bullet that did?” Just so. And also remember that the entry wound in Connally was elongated in shape, indicating that it was the result of a tumbling bullet. There was no conspiracy, and Oswald acted alone. Sherlock Holmes was right: “How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?” This silliness will never end as there’s an endless supply of crackpots out there that fancy themselves experts in conspiracies that don’t exist. But again, I’m not trying to convince anyone. At bottom, people believe what they want to believe.