RE: will it hurt my bow
as long as your over 322.5gr of finished arrow weight, you aint gunna hurt your bow....
but, your spine might be slightly off......could cause some issues when it comes to tuning...but theres lots of ways to fix that...last resort is buying new arrows....
also, whats the arrow legnth? many times its different than draw legnth.....to get a true spine reading you need software...those charts just get you close...often close enough...but when your borderline its nice to have software....maybe someone can run your specs on ontarget...but they need more info from you first...