I am in the military so I shave daily, my facial hair (and back hair unfortunately) grow like a dry grass fire so I have alot to shave every morning!
I started restoring razors and sometimes have a couple I want to test the edge on in the morning.
This can make for an unpleasant shaving experience. I went from a full hollow that I got the edge right on to a 1840 wedge that I didn't and it wasn't at all pleasing to the face!
I learned my lesson and will only try one unknown blade per morning from now on, I'm sure honemeisters learned this lesson early in their trade also. Just wanted to share.