Hawkmoon is capable of one shotting someone when luck in the chamber combines with holding aces. I can understand that facing someone with one that keeps one shotting you is aggravating, but frankly what's happening is that they are just having really good luck, and you are just drawing the short straw. It can also get you with a two shot headshot, but frankly my experience with Thorn and other high impact handcannons is that the first headshot is not the hardest thing to land, but you know what? I'll be damned if no one likes getting shot in the face enough to stick around most of the time for me to get that second headshot, usually, they get the hell out of the way.