I disagree.
Consider the physics- look at the Zabruder film.
Yup. I've done so. I'm not a ballistics expert, however, so I have to go to others for much analysis.
Even better, try to fire three bullets from a bolt-action rifle, and fire accurately over that distance at a moving target. I have friends who are professionals at such skills, and even they can't do it.
That may be meaningful for you, but it's meaningless for me. I don't know your friends. I don't know their qualifications.
I do know that I've seen a 70+ year old man sight a bolt action rifle, fire, work the bolt, re-sight, fire, work the bolt, re-sight and fire again in 7.2 second, 1.1 seconds less than the three shots in Dallas took. And it didn't seem particularly rushed.
I've read a lot of the conspiracy stuff. I've heard all of the arguments about why Oswald couldn't have done it. I started out with the mind-set that Oswald hadn't done it. And I, at this point, based on all that I've read and seen, am completely convinced that Oswald acted alone. There's absolutely no doubt left in my mind...