Cayugad - I don't 'hold over". If you did that you wouldn't be able to see the target as it would be blocked out by the barrel. My gun is sighted dead on at 100 when I split the front bead with the plane of the rear sight. To shoot the 200, I elevate (by lowering the butt and raising the muzzle) the front bead and post above the rear sight plane. In my mind's eye, I'd call it 3/16" of front bead/post exposed for the 200. I wish the front post had horizontal white or fiber optic lines up its face so I could use one of them to settle on the rear sight plane. That's my thinking by putting a spot of white-out on the front post around 3/16" below the bead. It doesn't have to be in the exact right spot, just needs to be there so my eye can choose the same relative position. I believe a good pair of eyes can detect a difference of not much more than a human hair in relating front and rear sight position. Remaining error is in the hold, squeeze and follow through.