When I baught my last bow in 1997, I was stupid and got caught in the speed craze that was being pushed at the time. I baught a Martin Fury, 65-80 pound 30" draw. A very fast, but unforgiving and noisy bow. I tried to shoot 430 gr. carbons, but the bow was too noisy and vibrated badly. I also quickly found out how hard it is to stabalize a broadhead at 300 fps. I asked olympic shooter Dee Wilde for some advice. He suggested to try a heavy arrow. I went to his pro shop and he handed me a 2219 (30" nock to insert) with a 100 gr. field point, total weight 580 gr. My bow was set at 75# and was shooting 270 fps. My bow was a lot quiteter and didn't vibrate. I have since installed 2 sets of limb savers. I still use this set up with the Thunderhead with great results. I admit I want a new bow (Mattews) but with the cost of a horse, medical bills (my son has had a lot of surgeries and other physical problems) and trying to start a new business, it hasn't left much money for a new bow. But I can't complain, because my old bow has served me well. I also like the fact that I am able to shoot a heavier arrow with relatively good speed. I do not know my KE off the top of my head. But my arrows have no problem making a passthrough on elk. Provided the arrow is tuned properly.