I assume your arrows are 350 spine carbon express. If my asumtion is correct and they are 350spine and you are pulling 60lb draw weight you should drop your spine down to the Carbon Express 250's as the 350's fit a higher draw weight than 60lbs. The bottom weight you should be pulling with 350's is 63-64 lbs. If the spine is to strong for your draw weight then your arrows won't flex correctly there fore giving you a little larger grouping. If you prefer CE arrows then try the 250's as they will react to your draw weight better. If you change arrow brands then you will want either a 250 spine or 400 spine in arrows such as easton. I do custom arrows.