The 861s are a progressive spring, the 851s are not.
On a fresh pair of 861s I have about 5" of lift. I'm sure they will settle some. My normal load is: rear bumper, tire carrier, storage box/sleeping platform, tools and camping gear in the box, Full belly armor.
They ride nice.
Friends that I wheel with have 851s and have more lift, probably another inch.
This is with ~3.5" of front lift and the 861s, ~5" of lift. No body lift.