I guess I was not specific enough. Once you hitch the empty trailer, pick a spot on the hitch, let's say the bottom of the receiver hitch socket, and measure the distance from there to the ground. Then roll your load onto the trailer and remeasure the distance to the ground. The difference is what I called "squat." I find that a very easy measure to be used for adjusting tongue weight. I may be off on the "6 to 8 inches" as that is from memory and varies from truck to truck. I do not think that 6 to 8 inches of squat put my old 2000 F250 4wd (nor my newer F150 4wd) onto the stops. And as I said, try it a few times and reach your own comfort zone with your truck, your trailer and your circumstance. In my case the empty trailer tongue weight on the hitch is not as much as 1000lb using a Pequea 1018 deckover trailer. Probably half of that. Too heavy to lift by myself but a light load when moving the trailer around using a small Kubota 3pt hitch, etc.