I remember a day where the sniper was a one shot kill weapon, and the blunderbuss wasn't as "good". The sniper got nerfed, and the blunderbuss became the new best thing, with one shot capabilities. I also remember the sniper getting nerfed, because the devs didn't want a one shot weapon in the game. Yet, here we are, still able to be one shot by the blunderbuss, while the sniper is basically a pistol with a scope.
Here's my two ideas for a fix.
One, you can buff the sniper to one shot, and keep the Blunderbuss where it is.
Two, you can nerf the blunderbuss to only do maybe 80% damage at max, and bring the sniper up to at least 75%.
Personally, with the charge behind the sniper shot, and the size of the ball, a shot into the chest or head should be a one shot kill. The pistol should honestly have about the same. The blunderbuss is comparable to a shotgun firing birdshot. Can be devastating at very close range, but useless otherwise. Which, yeah, that's about right in-game as well.
I feel like if anything, our hit boxes need split up into two, maybe 3 different boxes. Head, torso, and legs. If you get shot in the legs, you suffer from a small limp debuff. Good ol' broken leg effect. Shot in the torso, which we'll just include the arms in to simplify, you get standard 1x damage. Headshots? At the very least, 1.25x damage. This game has a lot to do with combat, both PvP and PvE. I feel like it should be expanded on, in more ways besides setting someone on fire, or throwing a small grenade of pellets at them.