I need your opinions. I have 24 arrows. One dozen are 9.9 gr inch arrows That shoot much slower than the other dozen. The other dozen are arrows that weigh 7.3 gpi. I have no chronograph, but my bow is set a 56 lbs, and is not very fast compared to other bows. Ibo is 296-304 fps. Which arrows would you hunt deer with. I've been using the 7.3 gpi, both shoot equally well. Thanks