358wsm -
The 4" extra radius will have surprisingly little effect over a 22" radius.
Assume you can align the irons so that the front sight is no more than 1/32" to the side of dead-on-target. (If you have decent sights you can probably do better.) At 100 yards that translates to the difference between 5.11" for a 22" sight radius and 4.32 for a 26" radius - a difference of only 0.79". If that distance is critical, I suggest using glass instead of irons.
The diameter of a standard clay pigeon is 108mm or 4.25". Using the ghost ring sight on my 16.1" barreled Ruger Scout .308, I can hit a clay at 100 about 80-85% of the time. I can't do that well with the irons on my 20" barreled Browning B92 in .44 Mag. The sights make a much bigger difference for me than the sight radius.
CH,
I'm picking up what you're laying down. Very well explained.
