The nosler ballistic tip is a pretty poor bullet for deer if you shoot them at 50 yds at high velocity, most will separate and go all through the meat.
As a side note I am curious as to what your idea of high velocity is. I use Nosler BT bullets out of a 270 Win and have shot several deer from 40 to 200 yards and have yet to have one "separate and go all through the meat". I understand there were more problems with BT in the early stages of their development, but I have yet to have one fail to exit.
That being said I like having two holes for a bloodtrail and I am sure most hunters here in the South will agree with me. No matter where you shoot a deer you cannot be 100% certain it is going to drop right in its tracks. In some of the thickets around here you can lose a deer within 40 yards if you don't have a bloodtrail. Maybe bloodtrails are not as important in wide open country, I don't know.