Your 2315's with a 100 gr. point should be fine, based on Easton's arrow selector and the info you posted. Are you using field points, or broadheads? What weight?
You may have some arrow rest issues. You also may have some string knock issues. You may have issues with the way you are shooting.
What rest are you using? How are your arrows fletched(feathers or vanes)? This list of questions could go on and on.
Bow tuning is simple. But, you need to have certain items in place, and some basic knowledge in order to tune your bow. Do you have an archery shop close by?
Take a kid with you. Show them the Great Outdoors. Pass it on.