Chuck,
I asked onhere before about what is best N or C scale and you came up with the micro superficial testing.
To my non metallurgist mind you won't be able to tell if the action is over carburized by using the micro superficial testing or not?
C scale yes, you go through the case, hence I have the C scale one and the fact that it was only 50£ on ebay (been recalibrated now).
And yes the 25C(was a 1930fn one)is really soft(unless I misunderstood his scale?), typically they are 55RC. Bolt 60rc
R.A Walsh uses the c scale for sure to, he notes that the case hardening on mausers wasn't done for strenght but for wear on the parts.Hard outside soft inside.
If I'm completely wrong I await to be shot down gracefully.
