there is more to a trigger pull than pure weight, a heavy pull can also be a good pull. There is too much misconception that a good trigger has to be a "hare" trigger!!! (pun intended)
Browning advise in their Field Service Manual for the Superposed that field guns specs are 4.5 to 5.5 lbs and Target Guns are 4.0 to 5.0 lbs. The Citori is also the same.
IMHO a pull of 5.5 can be also a good one, but it all depends on the weight of the gun and it must be drag free and not gritty - otherwise you just hate it !
another misconception is that if a trigger is set at a specific weight it will always release at that weight. There is always variation between pull weights, and even on good quality handbuilt guns this can be as much as a 1lb between the lightest and heaviest pull. Pull weights need to be averaged out over a minimum of 10 trigger releases - anything less doesn't usually give a true indication...
Fish weighing scales are also not that accurate - their spring mechanism messing up pull readings - if you want a true and accurate reading a dead weight pull is the only way to go.
These work on the basis that ounce weights are added to the pull scale until the weight is reached which the trigger releases at - you then know exactly to the ounce what the true release weight was for that pull.
A simple "dead weight" pull scale can be made from bent wire, the gun is then sat on its butt and ounce weights added until the trigger releases.
Jonty