Look at my hitch set up please....

Empirical: based on, concerned with, or verifiable by observation or experience rather than theory or pure logic.

I can dig out some old scale tickets, if that is what you need to see. Take a trip to the scales and acquire your own "Empirical" data. What is it that you want? That every chain link will change the front axle weight by "X" number of pounds? Give me all the variables involved and I will do the math.