Thanks DaveC:

Well I figured my bow was slower too & thought it should have been replaced by the company. I will buy both sets of limbs the 70# & the 60# to get my head clear: or at least perchance find out what, Dictionary, they are getting these words out of.
And when One reads on page 3 of the Manual & I am sure many other Manuals; it says “EVERY BOW PERFORMS BEST @ PEAK WEIGHT”.