Sounds like you need a real backstop,made with dense foam, arrows are not cheap, hay bails anything other than what your using, you can also hang a braided rug in half behind your target, that may stop them,but 320fps is cranking;) I use a kisser button and a peep to keep my form the same all the time, also use a release(freeflight) to cut out any finger problems, plus pulling back 85pds is not easy with fingers. When you put your arrow on the rest, hold it up right and take a look and see if your arrow is offset(not straight) if the arrow is not straight, have you played with the limb bolts, they can change your way the arrow sets on your rest, some people do that to reduce pounds on your draw, but has to be even on both sides, just a thought, there can be many things that are going wrong, start bye deleting the simple things first. Aim small hit small. RAMbo.