Re: Zero debate
Set your rifle in a good padded vise. Set the cross hairs on the POA (point of aim). Take your shot. After the shot adjust the rifle so that the cross hairs are, once again, on the point of aim. WITHOUT moving the rifle, adjust the cross hairs to the point of impact. A one shot, cold bore zero.
Now, if you want your rifle to be zeroed for a different range, simply adjust the elevation to the require moa/mil and shoot a qualifying shot.
Then, if you can, get to a range that has the distance of your desired zero yardage and fire for effect.