The real question is, How fast could the rifle be fired accurately? In the one and only rifle test that used the actual alleged murder weapon itself, i.e., the WC's rifle test, which was done by three Master-rated Army riflemen, one of the shooters fired three shots in as few as 4.45 seconds, but he missed the head and neck area of the targets almost every time. As we see from the target boards themselves, the three riflemen missed the head and neck area of the targets 19 out of 21 times, even though they were firing at stationary targets, were firing from only 30 feet up, and took as much time as they wanted for their first shot.
When the Army's Ronald Simmons testified to the WC about the test, he tried to put the best possible face on the results. Yet, he admitted that, based on the riflemen's scores, the chances of scoring a hit on the third shot were 0.4, or 4 out of 10--and this was with Simmons' assuming that any bullet that landed inside the target silhouette was a "hit," even if it was far from the aiming point.
If you look at the later rifle tests that WC defenders claim duplicated Oswald's alleged performance, you quickly see that they did no such thing. None of them involved firing the actual alleged murder weapon itself. None of them involved firing in a cramped space nor through a half-open window. None of them involved riflemen who were considered to be no more than mediocre shots, much less poor shots, who had only rarely fired a rifle in the preceding year.