I am having some problems shooting my bow. I just bought 6 CX Terminator Hunter arrows yesterday, 6075's, with 100 grain field points. I was out sighting it in today and I used a bag target. Then when I thought I got it, I got my 3d deer out to try. The first times I shot I was doing good at 10 yrds and 20. But when I Tried 30, the arrow went over the back of the deer and hit my dads car trailor and shattered. I was mad and quit for a while. Then later today, I decided to go out and try it again, I started off doing ok again, then I tried kneeling at 20 yrds, not a good idea, I missed again, over the back and hit the trailor and exploded. I am shooting a Reflex Gamegetter with 27 in draw length and about 65#'s. What could I be doing wrong and is there any good ideas Ican use to make a back stop?