All of you who think there is nothing to gain by shooting a heavier arrow need to tell that to a little bowhunter named Chuck Adams. He took all 28 species of North American big game with a heavy aluminum arrow appropriately dubbed the "Super Slam". Fast has it's benefits as does mass, it is up to the archer to decide what kind of a blend of the two best suits his/her needs. I am with Bigcountry, I have blown through three adult, Illinois deer, with a 52# recurve shooting a 575 gr. arrow. Heavier arrow=quieter at the shot, better arrow flight, and devestating when used with a super sharp cut on contact head. Assuming the arrow was placed where in needed to go in the animal being hunted.