I, for one, find myself more accurate with
a .45 than a 9mm.
But since 9mm ammo is cheaper,
I can afford to attempt to compensate
with more practice...
However, in answer to Mr. Camp's questioning statement:
Deer have a much higher muscle-mass ratio than humans.
They exercise much more regularly, and lead a more
spartan life overall. Combine that with instinctive response,
and any hit to a deer's body which does not involve critical
damage (i.e.-"instant kill" or paralysis) will generally involve
a lot of running...