I use Keyhole on my Gunslinger because the other two aren't my preference in PvP. I had the damage buff on for GG as well. My buddy was testing out Juggernaut because his shoulder charge got nerfed again, so he tried Juggernaut. I shot him with a GG shot and it just broke the shield, and didnt kill him. What the hell is this about? Yes, you can shoot them in the foot or head or wherever, but if you have a shotgun titan rushing at you, its easier to shoot them in the face than to aim for the leg or wherever. This should not be an advantage, especially with keyhole and extra damage on GG.