The Warren Commission time calculated was 8.3". You're right, I've seen as little as 6.x". Note, the Italian team could not repeat the feat, however, a police team did duplicate the feat a little better. Note: Although Oswald was a Marine, he scored the lowest possible score to pass and that was likely at the peak of his proficiency.
http://www.telegraph.co.uk/news/wor...-had-no-time-to-fire-all-Kennedy-bullets.html
I have a British Enfield, reputed to be the fastest bolt action rifle made for repeating shots and I seriously doubt I could recycle three rounds in that time and hit a moving target even at 50 yards, let along any further. An expert rifleman could fire 20-30 rounds in a minute using the Enfield. But, a Carcano is not an Enfield by any stretch.
https://en.wikipedia.org/wiki/Lee–Enfield
https://en.wikipedia.org/wiki/Carcano
BTW: I have no problem discussing this with you as you're a reasonable person.... I've gone the other way. I was just beginning University when this happened, so I didn't have a lot of time to keep up. I accepted the Warren Commission Report with doubt, but I've changed my mind over the years and seriously doubt Oswald did it alone. With all that was at stake for Johnson and his Texas cronies a lot was at stake for them. I don't speculate about who was involved, but I do believe Johnson was behind it....
The reason I questioned the timing was that the thing that started me on the road to lone nut theory believer was when, after reading a few conspiracy books, I picked up a copy of the actual Warren Report. I was very surprised to see that figure of 8.3 seconds, because the books I read usually said less than 6. There is no book entitled "Eight Seconds in Dallas."
Similar things happened when I read about the "magic bullet".
The thing was that it didn't immediately make me believe the single bullet theory. It wasn't a case of "the Warren Commission said a single bullet caused multiple wounds, but that is impossible, due to X...." Rather, it was what the books said about the Warren Commission itself. In other words, the books said, "The Warren Commission said 'X'.", but when I read the Warren Report, the commission didn't actually say that. Specifically, in this case, I had read that the Warren Commission had said all the shots were fired in the space of 5.6 seconds, or lower. However, the commission didn't say that.
It is possible to dispute the correctness of the Warren Commission's conclusion, or even of it's data. However, one cannot reasonably dispute the existence of the report, and I found that many authors could not, or chose not to, accurately cite the contents of the report.
Fortunately, that's not the case here. You have cited a correct value.
I participate in speed shooting contests myself. The format is almost always the same. 30 seconds to fire as many shots as you can. I'm not very good at it myself. I never win the contests. Lots of people fire faster/more accurately than I can. I can almost always get six shots off. At least half the time I can get seven. On a really good round, I can get eight shots off, so I always bring eight arrows to the range. Yes, arrows. The weapon I use is a longbow. On those good days, I can get 8 shots off. If you assume the first is ready (we are allowed to knock, but not aim, before the command to fire) that means a rate of 1 every 4.3 seconds. That's slightly slower than Oswald would have required.
I don't know much about Mannlicher Carcanos, or Enfields, but I'll bet you can fire them a lot faster than you can fire a longbow.
The shot just isn't remarkable. A lot of people who have watched various documentaries have questioned the shooting, but guys who try to shoot rifles very fast don't seem to think it was all that difficult.
Try googling "bolt action speed shooting". There are plenty of videos. I saw one that had 15 shots in 12 seconds. No, it wasn't with a Mannlicher. It was a Winchester 72. I don't know if that's faster or slower, but it could be a whole heck of a lot slower before it got to 3 or 4 seconds between shots. No one would bother putting up a youtube video of hitting two out of three shots in a period of 8, or even 6, seconds.
Then we move onto another point of contention you brought up in the post, now a few pages ago, that I originally responded to. The "pristine bullet". No way could it do that much damage and be so little damaged itself.
I had read about "what the Warren Report said". It's in quotes, because when I read what it really said, it didn't match what the books said it said.
There was a lot of talk about pristine bullets. I learned, I believe in the report itself, but perhaps in some commentaries, that the phrase "pristine bullet" has a specific meaning in ballistics literature, and it doesn't mean "a bullet with very little damage". It means a bullet, fired from a barrel of a gun, before colliding with any object. A ricochet is not a pristine bullet, regardless of its condition.
Meanwhile, I also learned that the bullet that the Warren Commission concluded caused those multiple wounds, really wasn't all that "pristine", even using the non-technical meaning of the word. It had significant damage, but most of the damage was at the base of the bullet, not the tip.
How do you damage the base of a bullet? Especially without damaging the tip? Contemplating how that might happen would, all by itself, strongly lead one to something a lot like the single bullet theory.
Or...not? What says the conspiracy theories? I usually see them handwave it away, as if the question was not significant. Have you seen a good explanation? Let's review the claims of the Warren Report, and come up with an alternative explanation. We have a bullet, flattened at the base, with minor damage at the tip. We have Governor Connally's wrist, broken, but not shattered. We have a thigh wound where a bullet broke the skin, but fell out. How do those things happen?
I, personally, think there's an explanation that requires one bullet. Note I am not saying "only" one bullet. I'm not saying that one bullet is possible. I'm saying it's hard to put all of those pieces together and come up with two bullets, unless possibly one was a very small caliber bullet, from a handgun or a .22 rifle, but there is strong evidence that was not the case. What does the conspiracy theory say?