There are a few things that could be affecting your arrow flight with broadheads. It could be that your bow is out of"tune" but it is more likely an arrow spine issue. People, especially Mathews followers like to scare people into thinking bow tuning is akin to finding the holy grail. It's not. Have you paper tested your bow? If not then that is where you start. this will let you know if yourarrows are spined correctly. If you don't tear a near perfect hole side to side than you probably have a spine problem. If your hole is up or down you have a nock point issue. Either one of these will give you inconsistant arrow flight magnified with broadheads. This test will set you free, but you have to be patient!!!!!!!!! Good Luck