"Army Lawyer on use of shotguns in combat"
"...British examination of its malaya experience determined that, to a range of thirty yards (27.4 meters), the probability of hitting a man-sized target with a shotgun was superior to that of all other weapons. The probability of hitting the intended target with an assault rifle was one in eleven. It was one in eight with a submachine gun firing a five-round burst. Shotguns had a hit probability ratio twice as good as rifles..."
It seems to me that many assault weapon and handgun bans, and other firearm laws are based on implicit theories of lethality derived from the media rather than actual empirical evidence of lethality and effectiviness of firearms in combat.