I am not sure who wrote the rule that there should be rules in war, but there is one rule that the military MUST use full metal jacket bullets in their rifles. Of course, there is a huge debate about the effectiveness of the American 5.56 round vs. the Russian 7.62 round. Obviously, if the Americans used hollow point ammunition instead of full metal jacket, the bullet would produce more tissue damage and essentially be more effective thus adding to the advantages of the caliber.
Let's say that the military does adopt a hollow point bullet in its combat rifles. What would be the advantages and disadvantages of doing so?