RE: Who said that physics wasn't fun?
Its true that a heavier arrow my carry more momentum. Contrary to popular believe you dont need a heavy arrow. Say a 365 grain arrow at around 300 fps. I will promise you there isnt a deer big enough to stop that arrow on a broadside shot threw the ribs. I dont understand why people are so caught up on the arrow weight thing, a 45lbs bow can get full penatration with medium weight arrows. My last set up was shooting a 360grain arrow at 310 fps, thats fairlya light arrow but it has enough KE or momentum to kill anything in north america, in most of the world for that matter.