A little higher than I prefer actually, and illustrated my theory, in reverse, that low chest shots make for quick bloodtrails. I had ranged my shooting lanes when the light allowed, and had to take a quick, almost snap shot at her as she turned and was about to go behind a tree. Total time from when I first saw her to arrow impact couldn't have been more than three seconds. I aimed at the point of her near shoulder and her turn put it just behind. I have no doubt this thing will penetrate well from any reasonable angle, barring a glancing hit on the largest bones. The tip on these Muzzys looks like something they would have used against armor once upon a time.
