When the factory calculated the tire pressure for a specific vehicle, how did they know how much weight each of us would add to the truck?? They didn't. Instead, tire pressure listed on the door jamb is what is needed to meet the manufacturer's stated GAWR, just like it states. But when there is almost 4000 lbs difference between empty and max load, I don't use the same PSI for both because it can't be the right pressure for both conditions. That is the value of a load inflation chart.
Bingo! When I run empty during the off season, fronts are 62, rears at 54. Tires wear evenly, no heat build up and it's not like you're riding a donkey from the left coast. :B