You have alot more energy being transferred into your arrow and that will equate into flatter trajectory.He has 55 ft/lb and you have 66 ft/lb,I believe is what I figured.You either have a longer draw or more poundage than him,right?


Arrow weight plays a role but the amount of energy you put into the arrow will directly affect how flat it shoots.


That is why most of the 3-d pros use bows around 65# instead of 55#.(I even know of atleast 1 that uses 80# only)Sure they can match the arrow weight to the poundage and get the chrono speed at the bow but the higher energy setup will yield in flatter trajectory.


This is why I had to get away from fat shafts,I didn't have enough energy to be accurate with them downrange.They lose too much speed too fast and become unstable and float on me.Basically,my groups opened up at distance with them.[:-]


Yes,heavier arrows do retain more downrangespeed.The reason you saw so much difference was a combonation of the 2.