i have a browning micro adrenaline set at 50lbs and 23 1/2 draw length with a whisker biscuit and a release and i wanted to know what kind of arrows should i use i really like the easton excell because of there price and perforence but i dont know what spine is or any thing like that and i was also wonderin if i should cut the arrows or what?and on the arrow it says it is a 400 with a 8.1 gpi but i have no idea what that is please help me!!!!