X IMPACTS or Rampage??? Decisions

Dew, I am trying to figure out which spine to shoot for the BE Rampages. My setup is similar to yours...70 lb., 28" arrow shaft, 50 grain insert, and 125 grain broadhead. You said Randy told you to go with 250 spine, but you're going with the 300? Suggestions?
 
I shoot a 2014 Carbon Spyder 34, same draw, same poundage and I'm shooting the X Impact with .250 spine, 125 grain head and the Black Eagle insert. I don't have the exact length available but weight is 480 gr and speed is 286 FPS. I've never had a strength issue with the outsert but it can be a challenge to get all to align so FBBH spin perfectly. I usually get 10 to 11 out of 12 perfect and simple shoot the others for practice.
 
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