Missing the first shot

Has anyone considered that the reason Oswald apparently missed on his 
first shot attempt was because of the rifle scope's magnification and too 
close range which would have presented Oswald with a very unstable view at

such close range.  Too, shooting at a left-to-right moving target for a 
right handed shooter is more difficult than a target moving straight away 
from the shooter.  Oswald's hesitation after the first shot was probably 
to allow more distance that would present a easier target.