Thanks RezDog for pointing Modine's work out to me. After reading his reviews my feeling is that barber hones are hit and miss things. Take for instance the 00Frictionite or the Swaty. He tested 2 of both. There appears to be a large inter-brand variation.
He tested the Apart hone and estimates it at 15K. I have one that produces much lower grit size results.
My point is: you have to know the individual barber hone in your possession before deciding to use it in any hone progression.