If you are drawing 28″ or more I am taking an educated guess that your arrows are underspined. MOST recurves are cut past center which gives you a bit more flexability with your arrow spine. If you are drawing more than 28″ you are effectively increasing your draw weight by approx. 3# per inch. The length of the shaft makes a big difference as well. The longer the shaft, no matter what arrow material, the more flexible the shaft. Point weight also makes a difference. When you go with a heavier point, it increases the flex of the shaft when shot. Due to a shoulder problem, I have dropped in draw weight to 48# at my 28″ draw. I am shooting a carbon shaft with a deflection of .400 which would put it in the 70# range, but I am shooting right a 300 grains on the front end. I suggest picking up TJ’s book as he explains it much better than I can. Good luck! Mike