Digital BW, The Print

> In summary I printed the darkest 20 steps from a 100 Step wedge on
> Photo Rag (308g) using the following Media settings in the Epson
> printer driver...

Rick here is a link to an Article by Paul Roark discussing a similar problem.  I assume you are 
using ABW so Paul's method of imbedding a correction curve in an ICC wouldn't apply but 
you may be able to transfer the concept to a preloaded correction curve applied directly to an 
image before printing.

http://www.paulroark.com/BW-Info/Fine%20Tuning%20the%20Dmax.pdf