Each bow will have a cetain BH where the bow shoots the best and is not AS noisy.

Regardless of how low a BH a bow will tolerate, I have always found, for my draw-length, if I get below 7 1/2" brace, the bow is too noisy and I can feel the shock much more. One older Bear I have pulls and shoots extremely nice at an 8" brace. I do not want the limbs over-flexing.