Tom, the most important thing is a quiet bow, if they hear it, ain't no bow fast enough to met that arrow there in time. Grixzly's are easy to sharpen, AFTER you learn how, up til then they will give you fits. Follow the instructions on the package, I lower the angle a bit on new heads with a good 8" mill file, after you get the bevel right turn the head over and with the file flat, just remove the burr. Rick