Yes, I've come across this type of problem more than once since the beta started. One occasion this guy I would spend an entire clip on would simply refuse to take a single hit, I would get maybe one hit marker and the corresponding damage number. He would then kill me pretty quickly and I know I wasn't having a lag issue because I was getting kills with other players without any problem the entire match. It would take about 3 people hosing the guy down with a stream of bullets to kill him, and even then, he'd manage to cause all sorts of hell. Another one would basically kill me in 2 shots with a primary weapon everytime. Now, I've used Scout Rifles and Hand Cannons in PVP and I've done consecutive headshots with them and it usually takes 3 or more, so I don't really think it's his gun, though it could be.