The last three deer I have shot I have had poor penetration... all three deer were within 30 yards and none of the arrows exited the deer...with all three deer, the arrow stuck in the opposite side rib and the arrow was broken off .I am shooting a high country bow set at 64lbs, 28" easton acc's with 85 grain spitfire broadheads. The bow shoots flat and extremely fast... It is very accurate and I am hitting exactly where I aim...but its like when the arrow hits the deer it just stops with a thump! no penetration.. The funny thing is I have taken 9 deer with this same set-up and bow and all except the last 3 were complete pass-thru's..Its like something has changed with the power of the bow but not the accuracy or speed.... if anyone has any advice i would greatly appreciate it.