Ok I have a Hoyt Buffalo with limbs that draw 46# and 56# @ 28" which so happens to be my draw weight. I have some CE Heriatge arrows on the way 250's and 350's. Ive done the Stu's calculator and the spine looks just about right if arrows are cut to 30.5" for both. I've never been this detailed with Trad equipment before but now that I'm in this for hunting I'm working towards the best shot I can be. Should I just cut arrows at the 30.5" or leave them full and work my way down with desired tip and insert weights?

I would recommend not cutting them all beforehand.  Carbons can be very sensitive to length so work your way down and you'll find what works best....Shawn

I never cut a carbon without shooting them full length and then trim and tune to get the correct dynamic spine.Stu's calculator will help some but there is always the human factor.I learned how to tune my bows and arrows years ago and it is the way I prefer to do it.

Don't cut them all at once. If you cut to 30.5 you will have a bop of 31".  You will need a fairly heavy front end 225g for the 350 to work with the 55#

Good luck