Here's my 5P 4/12 chip.
I got out that little tube of Rembrandt Perm. Violet and matched the Munsell chip again - just to make sure. Don't know if you can see the blob of paint on the Munsell chip - but it is there. (Neglected to include that Titanium was used to see the full chroma.)
(This color is very difficult to photograph - the photo is straight from the camera - no adjusting in photoshop.)
I'd be glad to donate the photos of all my Munsell work to the new Forum if Graydon and Rich feel it would be helpful. I'll wait til I hear from one of them, or their computer wizard on where/what to send.
I re-iterate what Paul and others have said. Reading and looking at pretty pictures is entertaining, but not very useful unless you are doing the work as well. And then it's a guideline - something to test on your own.
Also, someone thought of skipping the Student Book and going straight for the 'formulas' in the Big Book. There are NO FORMULAS in the Big Book (only Munsell notations)! You still must analyze and mix up what you think will match the chip. If it's not right then you must adjust - and sometimes it's only a tiny bit of an adjustment, but makes all the difference.
Graydon's already given us a list of paints that will hit 99% of those chips. Then it's just a question of doing the work.
Hang in there to everyone working on this - it gets easier!