Hi Fishnick2401,
Welcome to the Heartland Owners Forum.
Looking at some internet listings, the empty pin weight would be 3,590 lbs. The empty pin weight of 3,590 is about 22% of the listed empty trailer weight of 15,970.
Generally, 5th wheel pin weight runs around 20-25% of GVWR. GVWR on the 4113 is 20,000 lbs. So based on the 22% when empty, you might expect an actual pin weight, when loaded, to be around 4,400 lbs.
But on toy haulers, heavy toys in the back may reduce the pin weight a bit.
So depending on how you load the RV, you'll likely be between 3,590 and 4,400, and probably closer to 4,400.
Others may chime in if they know their measured pin weight when loaded. But since your loading may be different, you'll still have to load up and weigh your rig to know the actual pin weight.