Which makes it all the more strange that he completely missed the 1st shot.
All that was conjecture anyway
Oswald had to moved into position only AFTER the JFK limo begins down Elm st
Would have made sense if he was left handed.
that Oswald accidentally shot off his 1st shot, because he had his finger ready on the trigger AS he moved and he may have in his haste and anxiety, sqeezed the trigger.
Not very expert marksman like

The shooters were pros for sure.