I'm to the point where iron COR effect is not really in play. Over an 18 hole round, MOST if my full-swing shots are with a driver, FW, or hybrid. Given that, when I do make a full swing shot with an iron, it is usually an 8 iron or less. With a shaft that short, club-head speed is gonna be low, minimizing COR effect. Once I get up to a loft of about 40 degrees or higher, just about all my clubs go about the same distance. Eye 2, Acer XV, PING G400, steel, graphite, etc........ if the loft is about the same, the distance is about the same. The difference at that level is negligible for me.