Originally Posted by
DIY_guy
If you are doing it wrong and not reading the animals behavior and stretching your shot distance and shoot a light weight rig that makes the bow very loud due to a light arrow, certain game will react. One of the many benefits of heavy arrows and High FOC setups is how quite it makes the bow.
Granted I'll give you that. But if you go too heavy, even though you have more energy (call it KE or Momentum it doesn't really matter) your arrows may not fly as well as they would if they were properly spined for your draw weight and length. Too light will also have the same effect. I shoot 63# and shoot a 29" shaft with 100 gr head. My recommended spine for my Gold Tip arrows is 340 (8.2 gpi). However I go with a 300 (10.9 gpi) which gives me more weight and better arrow flight/groups. The IBO minimum of 5 gr per lb of draw weight is too light for hunting IMO. It makes the bow too loud and puts a lot more stress on the equipment.