We go about flat-band power settings differently from the rest of the industry. What we use is percentage of stack. Stack is the length at which the bands can no longer stretch. At anchor we like about 70% to 80 % of stack. In rough terms this means stack would happen about 3 to 5 inches past your anchor point. Shooting in this range generally gives one the best of both accuracy and longevity but it can be a little fickle. Sometimes this sweet spot varies with the slingshot model and ammo so we recommend experimenting. You may find your ideal power setting is 65% or 75% or it may be related to the model your shooting. The bottom line is to trust your instincts and you will know when the bands are just right.