LOL nah its kool.. Um in my experience and please this is just what I have observed. Everything 2 grains is 1 FPS loss. And my commander is set at 71# and shoots 298FPS with my easton axis CARBON slim tech with a 125gr field tip 2" Quik spin and wrap cut to 28". I would shoot whats comfortable to you. Like I said if your strict hunter. A tougher arrows is probably better AXIS FMJ/Carbon Maximas