I use redstartargets
http://www.redstartarget.com/store/1...25x10-packages
Its 1" squares so at 100 yards each 4 clicks is 1 moa on most scopes
This way if you shoot off your point of impact by 3 inches high and 2 left you can adjust 3 moa down and 2 moa right to be where you need to be since you are able to the grid outline