i have my bow set at 71-73 at 29 inch draw the arrow will be 2413 at 27.5 inch alumiums i think at 480 grains is this a good setup or is it underspine or overspne ps 100 grain tip

OE,
I'm shooting 29" Evolutions 340 ( Easton Carbons) with a 125 gr. Muzzy and mine are 483. The spine for the 2413 should be fine for your setup going by the Easton chart. Jackson archery site has some pretty good calculators on it if you want to put the numbers in on a bunch of different shafts. http://home.att.net/~sajackson/archery.html

I agree. The2413s with that setup should be fine in terms of spine and weight. I would probably be shooting them if I still was shooting aluminum.