75% meant that it is suggested to use 3,6 and 9 nozzles (since you have wind issues with the smaller nozzles) and I am using 2,4 and 7. Yes I am matched but using smaller nozzles than suggested.
I did a quick audit last night and I am putting down about .3"/hr and keep 40psi at an open hose bib while running. I will try nozzling up to 3,6,9 and see how it does. I think my heaviest zone will still around 11GPM.
I would like to get high enough PR to only water 4 times a week.
As for the diffuser, screw I have them set to just nick the stream, but not shorten the radius.
Thanks for the replies.