As mentioned, the key is the bullet missed the heart/lungs which allowed your buck to travel further. Like nighthawk, my most memorable frontal shot was at 50yds on a buck in MO that was ready to run. I took the shot with a 270 130gr partition and hit him dead center, low in the chest. He stumbled 30 yds before dying in the middle of a shallow pond. After I dragged him out (freezing weather), field dressing revealed the heart and one lung were liquified.
