The ML7200's hurt my fingers and are one of the most likely designs to exacerbate the hidden pains of long term playing.Doesn't make them stiffer. Larger outer wraps usually require LESS winds on a string, and ones that are rollerwound even less so. Meaning, Pressurewounds actually have less material on them than a comparable roundwound, because of the construction.
Someone from GHS mentioned the iron content as a possible reason for discomfort.
In any case when I tune them down one-half step they are pretty close to fine.
On the other hand, when it comes to tone they are easily one of the best sounding strings I have ever encountered.
Covering a wide spectrum of genres while adding new tones for me.