I went back to alu...had a carbon brake as I hit too close to the fornt shoulder...when he moved, his shoulder snapped off the arrow right in front of the vanes, and that peice fell out, and the other 3/4 of the arrow fell out a few steps later...I think alu would have stayed in him longer, and done more damage. All in all, I'm glad it went like it did...I made a bad shot, and big boy is still cruising around without so much as a limp...hope he donates some venision to me nect year.