I think the shot was about 90 yards .
FBI tests[edit]
The FBI tests of the Carcano's accuracy showed:
1) FBI firearms expert Robert A. Frazier testified that "It is a very accurate weapon. The targets we fired show that."
[64] From 15 yards (14 m), all three bullets in a test firing landed approximately 2+1⁄2 inches (64 mm) high, and 1-inch (25 mm) to the right, in the area about the size of a dime (0.705 inch diameter).
[65] At 100 yards (91 m), the test shots landed 2+1⁄2 to 5 inches (64 to 127 mm) high, within a 3-to-5-inch (76 to 127 mm) circle. Frazier testified that the scope's high variation would actually work in the shooter's favor: with a target moving away from the shooter, no lead correction would have been necessary to follow the target. "At that range, at that distance, 175 to 265 feet [53 to 81 m],
[66] with this rifle and that telescopic sight, I would not have allowed any lead — I would not have made any correction for lead merely to hit a target of that size."
2) The rifle couldn't be perfectly sighted using the scope (i.e., thereby eliminating the above overshoot completely) without installing two metal shims (small metal plates), which were not present when the rifle arrived for testing, and were never found.
[67] Frazier testified that there was "a rather severe scrape" on the scope tube, and that the sight could have been bent or damaged. He was unable to determine when the defect occurred before the FBI received the rifle and scope on November 27, 1963.
Ballistics Research Laboratory tests[edit]
In an effort to test the rifle under conditions that matched the assassination, the Infantry Weapons Evaluation Branch of the U.S. Army's
Ballistics Research Laboratory had expert riflemen fire the assassination weapon from a tower at three silhouette targets at distances of 175, 240 and 265 feet (53, 73 and 81 m).
[68] Using the assassination rifle mounted with the telescopic sight, three marksmen, rated as master by the
National Rifle Association, each fired two series of three shots. In the first series, the firers required time spans of 4.6, 6.75, and 8.25 seconds respectively. On the second series, they required 5.15, 6.45, and 7 seconds. The marksmen took as much time as they wanted for the first target at 175 feet (53 m), and all hit the target. For the first four attempts, the firers missed the second shot at 240 feet (73 m) by several inches. Five of the six shots hit the third target at 265 feet (81 m), the distance of President Kennedy from the sixth floor window when he was struck in the head.
[69] None of the marksmen had any practice with the assassination weapon beforehand except to work the bolt.
During the investigation by the House Select Committee on Assassinations (1976–1978), the lead attorneys for the Committee, Robert Blakey and Gary Cornwell, were allowed to use WC-139 at an FBI firing range. The attorneys wanted to see how fast the bolt action could be operated. Blakey was able to fire two rounds in 1.5 seconds and Cornwell fired two rounds in 1.2 seconds. This was an experiment to test a possible theory that Oswald in his excitement may have pointed and fired, as opposed to aimed and fired. Some critics of the Warren Commission had claimed it was impossible to fire a Carcano rifle in less than 2.3 seconds. Both the CBS and HSCA tests proved conclusively that the claim was not accurate.
[70]
Anyways, watch the documentary. As said before the entire scene was recreated.
That is all.