If someone thinks he/she can hold to 1/8 inch difference out to 500 yards on a game animal, I just want to watch them shoot. Is his group so good that he feels the 1/8 vs 1/4 is going to make the rifle shoot better? It would be interesting to mount one with 1/8 adjustments and shoot at 500yds.Then swap to a 1/4" and shoot again. Bottom line is let him buy what he wants and you will not have to listen if something is not to his liking. I have used both but now don't have any 1/8" adjusters.Rick.