In my quest for another bow, I'm really getting an education. I'm looking for a new hunting bow. Up until now all the bows I've purchased have been 60-70 lb bows.I always shot about 63 lbs for a hunting bow. I've noticed recently, especially in cold weather, pulling a 63 lb bow back on a buck isn't as easy as it used to be. I've been told by several people that shooting a bow at its peak weight is better than shooting it at a lower weight. Can somebody explain if that's true and if so, why?