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In an effort to test the rifle under conditions which simulated those which prevailed during 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 (81 m).[36] 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.[37] None of the marksmen had any practice with the assassination weapon beforehand except to work the bolt.
CBS conducted a firing test in 1967 at the H. P. White Ballistics Laboratory located in Street, Maryland. For the test 11 marksmen from diverse backgrounds were invited to participate: 3 Maryland State Troopers, 1 weapons engineer, 1 sporting goods dealer, 1 sportsman, 1 ballistics technician, 1 ex-paratrooper, and 3 H. P. White employees. CBS provided several Carcano rifles for the test. The MC rifle WC-139 was not used in this test. The targets were color coded orange for head/shoulder silhouette and blue for a near miss. The results of the CBS test were as follows: 7 of 11 shooters were able to fire three rounds under 5.6 seconds (64%). Of those 7 shooters, 6 hit the orange target once (86%), and 5 hit the orange target twice (71%). Out of 60 rounds fired, 25 hit the orange (42%), 21 hit the blue portion of the target (35%), and there were 14 misses on the target (23%).
One volunteer was unable to operate his rifle effectively so the following statistics are based on the 10 remaining shooters. The average time of all 10 was 5.64 seconds. The mode was 5.55 seconds and the mean was 5.70 seconds. The average for the top five shooters was 5.12 seconds, and for the bottom five shooters 6.16 seconds. There was a high occurrence of jamming during the test. On average the rifles jammed after 6 rounds. The most rounds fired without jamming were 14, 11, 10 in a row. The least was 0 (back to back).
The first shooter to lead off the experiment was Al Sherman, Maryland State Trooper. The record of his effort: 5.0 sec: 2 orange, 1 blue / 6.0 sec: 2 orange, 1 blue / NT (jam at 3rd cartidge)/ 5.2 sec: 1 orange, 2 low / 5.0 sec: 1 orange, 2 blue. Sherman was able to fire 8 rounds before his rifle jammed. Of all shooters, the fastest times were: 4.1 sec, 4.3 sec, 4.9 sec, 5.0 sec. The best accuracy was 3 orange in 5.2 seconds. The rifles were oiled and allowed to cool down between shooters.
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