With 100 grain tips, and a 55 lb. draw weight at 30", you should be good with any Easton 400 series arrow. Going up to 60 lbs, with either the 100 or 125 grain head, is going to require the 340 series arrows at 30" length. The Axis ST would put you over 400 grains in total arrow weight, providing great accuracy and superior penetration.