[DOC44]

Simulating the JFK Assassination
For the benefit of the Warren Commission, expert riflemen from the US Army and the FBI attempted to duplicate the assassin’s task, using the rifle that had been discovered on the sixth floor of the Texas School Book Depository.
Even after fixing some of the gun’s mechanical problems, and despite firing at stationary targets from an easier vantage point, they failed to achieve the combination of accuracy and speed demanded of the lone gunman: two hits out of three, within about six seconds (see Warren Commission Hearings, vol.3, p.446 and pp.403–10).

http://22november1963.org.uk/lee-harvey-oswald-marksman-sharpshooter

[Alberta's Child]

I thought the whole "2 out of 3 shots in six seconds" thing had been debunked.

It was based on the presumption that Oswald fired three shots and missed with the second one, but it's more likely that the first shot was the one that missed. That would have meant Oswald got off two shots, not three, in the six-second interval.

[TexasGunLover]

Simulating the JFK Assassination

They didn't simulate it. They conducted a completely different test not at all replicating the situation....

https://www.quora.com/JFK-Assassination-November-1963-How-difficult-was-the-shot-taken-by-Lee-Harvey-Oswald

[karnage]

Your data is old. More recent research has debunked this repeatedly and clearly.