LynnBlakeGolf Forums - View Single Post - 2-E and COR Thread: 2-E and COR View Single Post #1 11-11-2007, 02:01 PM Kumabjorn Member Join Date: Jan 2007 Location: Outside Lund in Sweden Posts: 67 2-E and COR At the beginning of 2-E HK states that COR for better golf balls are 80% but it drops below 70% at higher speeds. Is there a "diminishing return" on higher driver speeds? In other words, if my "controlled" driver spped is 108 mph, but I can get it up to 111 mph (with various results) the extra 3 mph just isn't worth it? Second, are the 80% and 70% figures valid even with modern balls like Pro V1 or HX Tour? Kumabjorn View Public Profile Send a private message to Kumabjorn Find all posts by Kumabjorn