Originally Posted by Feral
The way I read it is that is is firing high i.e. the POI is above the crosshair so shimming the front is needed to raise the cross hair up to the poi
Don't worry, it took me 5 mins to think about it as well...
Yep, when you cant move the turret in a direction, the only option is to move the scope itself... if you need to move the x-hairs up, you need to make the scope look up, but have run out of travel, so shim the front. If you need to move the x-hairs down, then you need to make the scope look down, shim the front so it looks down.