The reason it's so popular among hitmen is precisely because of its lower power.It will enter the skull,but will not exit.Instead,it ricochets around the inside of the skull effectively destroying the targets brain.
as for this, its basically just a common misconception that has been said so many times that people see it as fact, anybody with any knowledge of ballistics knows this is the extreme exception, rather than the rule. just because a round enters and fails to exit doesn't mean that it has been "bouncing around". all it means is that it has dumped all of its energy, and has lodged itself in either flesh or bone.
