I didnt read the other post's so i am probably repeating, but...carbon is stronger and does not bend. If you invest in the right carbon arrows and don't loose them, you will have the same one's for years. I've had the same gold tips for two years with no problems. I shoot 7595s at 29.5" with a 100 grain tip and feathers, 398 grains. All of them withen 2 grains. I love aluminums, and shoot them occasionally for indoor, but the pass through scenario on animals is much different. Carbon is smaller in diameter than aluminum, making a smaller hole. The broadhead does most of the work on the animal and the carbon has less impact on the slowing impact than aluminum arrows do.