I would also say scale. From what I understand you don't want your arrows any less than 5 grains per pound that you are pulling or it can be hard on your bow. I'd be careful with that.
I agree they will go by the scales. But to play a little devils advocate here does this mean that we should set our bows at whatever the limbs are labeled??? What I mean is my bow is a 70# bow but will max out around 72-73 should I back out the limb bolts to set it at 70# since the limbs are marked 70?????