The best thing to do to save a lot of headaches in the futiure would be to spend the $40 and get Archers Advantage.

http://archersadvantage.com/

Even tho it cost 40 bucks you will save money in the long run by selecting an arrow then running it through the program as opposed to going out buying 1/2 dozen arrows only to find out they are no good to your set up

The program has a lot of stuff in it from arrow selection to balistic charts to printing off sight tapes and markings.