Well, I didn't find the dummy load I was looking for, but an old surplus one I picked up years ago.
I ran TXCAL.? Here is the revised chart at 100% drive into the dummy load running through a Daiwa power meter:
BAND? ? ? ? ? WATTS
80? ? ? ? ? ? ? ? ?29
40? ? ? ? ? ? ? ? ?38
30? ? ? ? ? ? ? ? ?32
20? ? ? ? ? ? ? ? ?32
17? ? ? ? ? ? ? ? ?18
15? ? ? ? ? ? ? ? ?20
12? ? ? ? ? ? ? ? ?18
10? ? ? ? ? ? ? ? ?15
This looks a lot better.
Thanks Farhan!