Not really. I did learn a couple things. One about momentum and KE although different have the same results. Two, an arrow of 400-450 grs is plenty for any NA big game when the proper BH is used. And three you think you are right every time. And you can't tell me deer or antelope don't duck the string. I've seen it too many times. If you don't believe that I know you're just blowing smoke.