I subscribe to the notion that a deer hunting arrow should be heavy and the heavier the better. I hunted this past season with a 533gr arrow w/17%FOC and am looking to make a 610gr w/17.5%FOC arrow for next season. My maximum yardage is 25yds. Certainly other folks have longer yardage considerations and weight may play a factor but at my hunting yardage weight is not an issue. The heavy arrow with a four feather fletch should give me maximum "forgiveness" in most deer hunting situations so that if I don't have perfect weather and make the perfect shot the percentages will still be with me.