It was already explained by others and I have a cosine indicator in my kit and shoot a lot on paper but don't go by me test it, every kit + shooter will produce a different result.
The theory it's correct but it uses the path of the pellet and we place the scope 2 inches way from the barrel, shim, etc, that cross the path and destroy the theory specially at close ranges.
Like Rob explained in my kit at 11 yards I have 86 clicks and at 10 yards I have 110, its 24 clicks difference if the angle produces a cosine of 0.9 that will make me to probably miss.
Apart from the theory if there’s wind or it’s a stander you probably miss if you shoot the border.
Last edited by Delphinus; 29th October 2011 at 05:34 PM.