I did test that a little yesterday with a pile of brush.When bucket or grapple is full, keep the load as low to the ground as possible.
These aren't forklifts on level ground.
No matter what anyone tells you, you'll learn the hard way, lol. Just one high load on slightly uneven ground, try and make a turn, and you'll lift a rear wheel off the ground and scare the shit out of yourself. Happens quick.
I took it high & did a few jerks to see if I could ollie.