The Carcano was a cheap rifle ($12.00 at the time Oswald purchased it) but it was still accurate enough to kill from the distance Oswald was from the motorcade.
If you ever go to the Assassination museum in Dealy Plaza and stand in the sniper’s nest, you’d be surprised just how short a distance it was from there, to the motorcade route.
Oswald was awarded “Sharpshooter” status in the USMC. He was a good enough marksman to accomplish what he did.
the most inaccurate rifle in human history
Who told you that?
The very best data on the single bullet is in Mark Fuhrman’s recent book on the killing. He shows that there were actually three shots hitting Kennedy and Connelly—three separate shots—all from Oswald. The single bullet theory, he claims, doesn’t work but doesn’t exclude Oswald as the only shooter.
There is or was a gun shop owner in Baltimore that was asked to repeat that shooting since he was a well qualified marksman. He did it with time to spare using a like rifle.
Oswald was using a Carcano, the most inaccurate rifle in human history.
Sorry, the Carcano was used by the Italian Olympic team,
With a good issue weapon and a competent gunsmith they can be made very accurate. Certainly accurate enough and fast enough operating to do what Oswald is supposed to have done.