Brother sounds like you may have missed the vitals if he went that far and is still running. If you took out one lung the deer wouldnt have gotten that far. 1 inch is a little small though legal id stick with 1.5 inches. . Did the deer duck the shot maybe I have seen deer duck perfect shots getting so low maybe he ducked and your shot that was spot on from the angle tured out not so good cause he ducked low and it hit through High? Did you recover the arrow?