Actually in order to use the easton arrow charts and others you would use an arrow shorter than your draw length, not longer. Your amo arrow length with a newer bow would be about one inch shorter than your draw length (3/4" actually). Download eastons tuning guide and it will show how to check it I think.

You will notice that thy don't ask what your draw length is, just your arrow length. They assume you are using a proper length arrow. Which is one inch past the contact point of your rest. And your rest is suposed to be set up with that contact point right above your grip. If it is farther back and you shoot a shorter arrow you have to tell it you are using an overdraw and how much. There is no provision for using an arrow longer than what it calls for.

Can you use a longer arrow? Sure you can, you just have to compensate for it is all. Normally one inch will not make a huge difference. It is pretty common for people to shoot the same length arrow as thier draw, like you stated 28.5 inch draw, 28.5 inch arrow. It just makes it easier to remember. However I would just make it 28 inches even so it was easier. Remember though when you shoot a longer arrow it will be weaker in spine.

Older bows didn't have cut out risers or larger arrow shelfs so the arrow had to stick out past the riser in order to have clearance and be safe. The newer bows have larger shelfs and cut out risers so you can use a shorter arrow. And the charts have been adjusted accordingly.

The best thing to do is use some sort of arrow software to pick your arrows to begin with. That way you can use any length arrow with any draw length and it will figure the correct arrow and point weight for you. You can shoot a full length arrow if you want to. You will just have to play around to get the right spine and they will be heavier than they need to be.

Paul