I assumed a fast flight string and a 28" draw, the Stu Miller calculator at 3Rivers is showing me this:
The bow's dynamic spine is 62.
CX Heritage 250 cut @ 30.5", standard 11 grain insert with 175 grain point and 3 5" feathers, dynamic spine of 61.8. 531 total grains, 16.8% FOC.
I've found the Stu Miller/3Rivers calculator to be in the ballpark, but I always enter the shaft as full length and go from there. I would err on the side of caution and order a test kit before dumping money at a half or full dozen. You may be surprised what your bow likes.