I have always hunted with heavy aluminums and always will. Strings last longer and so do bows. Aluminums are quieter and just as durable as carbons, if your bending them pulling them from targets than someone needs to show you how to pull arrows. Although a high speed arrow can have the same KE as a slower heavier arrow there is the factor of momentom. Heavy arrows carry their KE longer and are harder to stop than light ones when impacting something like the ribs or spine of a large animal. Try to hunt dangerous game in Africa with a 500gr. arrow thats going 280 fps, that makes about 87ft. lbs of energy where as an 800gr. arrow at 220fps is the same KE but only the heavy arrow is recommended for Buff etc. Now this speed vs weight doesn`t really have any merit in NA. because we only have a couple animals, moose, musk ox, and maybe brown bears that warrent the need for the KE numbers that I`m talking about. Heck when I stated bowhunting a bow that could shoot over 205 was on fire. Speed or arrow weight don`t kill, accuracy does.