27 1/2 Draw length very short arrows for me as well. The arrow my have been slowed by the shoulder blade or a rib on exit side. The bow I use is not real fast a PSE Stinger 3G. The big cut may not make a pass through easy but the damage it does with 90% penetration was death to the Deer for sure. I found the arrow on the ground so it may have been almost all the way through and barely hanging on to the hide. Like you said the deer was dead and recovered quickly. The angle also had me pushing through a lot of tissue, the only reason I know it sliced through one rib is because I just happen to notice it while field dressing her.