Hmmm....just thinking aloud....
I just tried closing my dominant (right) eye and pointing across the room (with my right hand, I'm right handed).....
opening it and see where I pointed then...
seemed to me to be about 4 inches off to the right for a distance of 10 feet.
Tried again pointing with left hand with dominant eye closed and then opening it....same result...
So I'm gonna try aiming a bit off to the left when shooting with my left hand next time I'm out...actually never tried that for earnest....
my best
Gudmann Bragi
Reykjavik Paintball Club, RPC