During that flight I was practically overweight. It struggled to take off from the field the mission started at.
To be fair I wanted to fly as fast as I could so I was using max power but the plane was struggling to reach FL120 anyway.
If I adjusted for that FF you mentioned I would be going at a snails pace and it was a long mission.
The Beaver is even worse though. There were a couple times there was no way I could reach my destination with the fuel I had.