3.5 ~4 #'s first 'pull' 4.5~5 #'s second 'pull' for a shot gun, second bbl pull one pound heavier, w/minmal slack/takeup for either, but neither of them need be rifle crisp with zero slack or take-up.

Just my own opinion. I am not THAT aware in the field if the trigger[s] should be a bit heavier or looser, but a too light a trigger is immediately a real problem, be it targets or field work. Here one is better to err a bit heavy rather than light.