My hunting bow has a 9 inch stab on the front with no added weight and a 6 inch out the side/back with 8oz of weight, 28 inch draw and 31 ATA. Longer bows do seem to stabilize better and faster.
I shot the same bow in ABA Hunter Challenge Class and I find it shoots well, really stable and with a bit extra weight I hardly notice. Other people say my bow is heavy but I really don't notice because all my bows are heavy
LC