CX Heritage vs. Terminators spine

[JSimon]

I'm shooting Carbon Express Terminators 4560 right now. If I switch to the Heritage arrows should I go with 150's or 250's, assuming I keep everything else the same?

My setup is a 45lb@28" Quinn Stallion cut 5/16" past center. My draw length is 30" and my arrows are cut 31.75". I'm using aluminum inserts and 125 grain points and I shoot off of an elevated rest.

If I switch to 50lb. limbs should I go with 150's or 250's? Thanks for the help,
Jeff

[Zmonster]

Ide say 150's. The 150's are on the stiff side.

[beachbowhunter]

250s would be way too stiff.

[JSimon]

Thanks guys. That's what I was thinking, but 3rivers shaft selection chart puts me well into the 250 range for 31.75" arrow and 125 grain heads at either draw weight. I would think that their charts are way off.