Replace the right click with a true slug. Everyone already thinks that this is how the gun works, and it makes the gun much more realistic and useful. The left click can stay the same, but the right click should one tap if you headshot someone. At the same time, it won't be skill-less like old bucky, where you could one tap from a mile away on the body. Obviously there should be a range limit, maybe only have it one tap within like 20 m. That way it won't just replace the sheriff. This will also give the bucky an actual niche instead of just worse judge. Just like old bucky, this buff would make it the sniper shotgun, but this time, you need actual skill in order to snipe.