I SHOOT WINCHESTER POWER POINT 150 GRAI IN A 308 IVE ALLWAYS HAD A ENTER AND EXIT HOLE . THIS YEAR MONDAY EVEING I SHOT A 9 POINT AT ABOUT 70 YARDS IN THE LUNGS DEER WENT ABOUT 30 YARDS AND FELL DEAD BUT I DID NOT HAVE A EXIT HOLE I CANT FIGURE IT OUT I NEVER HAD THIS HAPPEN BEFORE ANY ONE EVER HAD THIS HAPPEN SHOOTING THE WINCHESTER POWER POINTS ??????