THWACK is right about being able to see one of the animals fall. On the seventy yarder that was shot, the cameria never turned off until the animal was down. It was only a matter of a very few seconds.
GUTSHOT does your name say something about your shooting? Maybe you need to let them get REAL close.
Also note that they had range finders so they knew the exact yardages they were shooting.
As far as the point that 6ptsika made, they were hunting in extremely open country that didn't allow for close stalks. They explained in the show that it wasn't the best conditions to stalk, because the bulls were not traveling with the cows at that time making it much more difficult. Besides Matthew's would not have gotten the publicity if they were using guns.