I believe those are a 400 spine and with your specs I definitely would not go any heavier on your tip weight.
Originally Posted by elk*hunter
However something doesn't jive with your total weight you mentioned in your original post 350 gr. At 8.4 grains per inch that puts you at 243.6 just raw shaft. So if you have a 100 gr. tip blazers, inserts and nock that would put you well over 350gr. Even at a 85 grain tip would be still over the 350gr. Just bringing this up because your FOC just might be more than you think. Maybe you had a number off on your calculations.