I have had an osage bow for about 8 years now and I go this bow regularly for shooting. It really hasnt changed in all those years. I do notice the weight fluctualtes a little with the humidity, just a couple of pounds. Most bows I seldom give a real good test to as I make so many and change bows so often. I gave a friend a yew bow about 5 years ago that he shoots all the time, it's his only bow, hasnt lost any draw weight yet. Steve