RE: Need Help Quick...
If I am understanding this corectly there are 13 targets with a maximum of ten points each for 130 points? If this is the case I wouldn't sweat it one bit. Even if you only scored lung hits and no heart hits on every shot that is still 104 points. Any how, the double lunger is a more effective hit than a heart shot.
I too wouldn't go changing any of my set up right now. Use what you are going to hunt with and not a bunch of stuff that you're going to change. Also take huntmup's advice and practice at longer distances than the 33 yards that you have to test.