well i like my alumiunms but they are heavy (479) grains. so i bought some beman ics black carbon hunters arrows cut to 27.5 inch. iam shooting 71# draw and according to bow jackson hunting page they weigth 411 grians i like to shoot 6 grian per pound draw weight. will these arrows be alright for 1 3/4" expandable broadheads and still get real good penatration.. iam shoot bowtech might mite 29 inch draw and 71#

If you bow is tuned and the arrow is flying properly 71lb should be plenty of umph to get good penetration. Right now you're at about 5.78gpi.Thats retty close to 6gpi

thanks