Craig Roberts alleges Hathcock said this. There's absolutely no proof he actually did so. Craig Roberts was (surprise surprise) touting his conspiracy book 'Kill Zone' at the time.
Were these guys better shots than Hathcock...I seriously doubt it.
Did you listen to the video? Of course not.
Dan Rather's storytelling
1. Dan says the men who participated had NO familiarity with a Carcano. Sure, I bet none of them knew what the demonstration was for, too.
2. Dan says there were 11 who participated, he describes 3 of the results. So a sample of 11 and Dan gives a sub-sample. I wonder how many samples he went through before he found one guy who had a time of 5.22 seconds in a controlled environment. That time is twice as long but then again on Nov 22 1963, there was more than one shooter. Maybe Dan meant to combine the times of the 3 participants he showed.