Trigger question

[King Cobb]

Not sure what the trigger pull should be on a parker. Most shotguns have trigger pulls ranging from 3-7lbs depending on the maker and when it was made. Some people finagle their trigger pulls down to 2lbs or less, more common in rifle and pistol shooting, have never understood the reason in a shotgun...to be honest, I have never understood the need for a 2lb trigger pull or less on any of my guns, anything below 3 just worries me.