LOL!
I think 3 shots could easily be done in 8.3 seconds. It's the returning to aimpoint 3 times and hitting a moving target that would be the challenge.
He said that the car was going down hill at that stretch, so, Oswald just had to chamber rounds and make very minor elevation adjustments.
The target was esentially stationary since the limo was moving slowly away in-line with Oswalds line of fire.
“It’s the returning to aimpoint 3 times and hitting a moving target that would be the challenge.”
Yea - all these gun experts here have no experience with cheap vintage bolt actions that had incredible creep and pull in their triggers.
A marksman trained to squeeze these triggers for 4 or 5 minutes of accuracy would take 10 to 15 seconds for one shot.
If you start the clock correctly as you fire the first shot, you only have to return to aimpoint twice.