Cargo,
Center shot on my Pat Dually sits inside the arrow shelf.........without breaking it out of the case and measuring my CXL 350' s sit with the left edge of the shaft just about on the edge of the arrow shelf. Yeah you are out there, and I' ll point at arrow spine as well. Think about it........you are basically shooting the fastest bow in the world so conventional spine charts are tough to apply, plus I think many are on the weak side....especially Gold Tips. Anyway if you are going to err do it on the stiff side, my BowTech duallys LOVE stiff arrows.
I' m shooting CXL 350' s and Linejammers for 3D, and at 29.5" arrow length and 57-60# that I' m shooting their chart shows me almost into the CXL150' s!! I think these bows would detonate a CXL150, and I' d be nervous shooting a 250 at that weight........well that and the fact it would probably be doing about 320fps.
In any event both my Pat Dually and my Pro40 Dually LOVE these 350' s and they fly like darts.
Also check your fletch clearance off that rest.......just because its a drop away, doesn' t mean for sure it' s getting out of the way. Its a quality rest, but I have heard of some guys getting contact from that model.