I would think the 400 spine would do the trick, and I would get a field point test kit and play with those first. The test kit comes with 125,145,175,200 and 250 grain field points. I almost forgot to ask what inserts are you using the standard ones or the brass 50gr or 75 grain. Thats going to make a difference on the spine of shaft you need to. If you like heavy points than you might want to buy the MFX test kit and play around with point weights and insert weights, just dont use the expoxy until you find out what combo your bow likes. I think if it was me I would order both test kits and go from there its alot cheaper than buying shafts that dont spine right for your bow. Just my opinion, i just got some MFX shafts too I really like them so far