On Bergger enlarging paper using Ansco 130 (slightly modified) paper developer I have been getting a D-Max of 2.21 / 2.22 (my Macbeth kept on fluttering between the two numbers).
This is the highest I have ever been able to get on any enlarging paper!
In addition the tonal quality of this paper is terrific!
- Thought those of you that enlarge your prints would like to know!
(I am in no way associated with Bergger or any company that sells the stuff.)