I saw someone with three extra vanes near the front of the arrow, whats the deal never seen that before. I belive it was digger's post in this forum. Also have been hearing rumors of a crossbow season next year here in virginia, will not know for sure until June. I have started researching already. What kind of groups can be expected at 40 yards, do deer duck the string from noise? Is 40 yards even reasonable for deer hunting?