You could also download On Target 2 and try it out free for ten days to see if you like it. Later if you wanted to buy it you can do that for 24.95 U.S. I just ran your figures through it and I agree with Aussie , the 500's areunderspined. But a match i did find would be your bow at 60 lbs., 27 inch arrow and draw length. Going with the Beman ICS hunters in 400 spine with a 125 grain head plus insert using 2 inch blazers Your FOC would be 13.95 % , the arrows would weigh in at 400 grains with a KE of 59.4 lbs. THis setup ran you in the middle of the green zone so you would still be able to up your draw weight to 63 lbs and still be in the green zone although it will be in the lower end of the green zone. Aussie guy see if AA comes up with those figures if you would. I am still getting used to OT2 so I could possibly be making a mistake on it.