I have noticed that the rear springs really have no backbone. If you have any kind of load you are always close to the bump stops. I do have the airlift kit installed and that does help overall. However the airlift kit is really a band aid when stiffer springs are needed. Even a spacer underneath the spring might help. Has anyone ever changed the spring or added a spacer? I had 500lb load in the back last week and I was an inch or two away from the bump stops. My bags were at 25 PSI.
Ummm...air up the bags more. I run close to 20# empty. I've had far more than 500# back there at at 35psi it was fine. H&R makes a stiffer spring but it lowers you an inch. I'd prefer to go lower than higher so that's your call. I'm content with the bags.