The difficulty level can vary when it comes to grinding them.
Phil Gibbs once said that most of the Camillus knives were blanked, heat-treated and then ground. They used big liquid cooled grinders so heal buildup was not a problem.
I imagine Schrade used a very similar process. I have a drawer full of Schrade & Camillus blanks, but have not had time to learn how to grind them yet. With just a 2 X 72 belt sander you have to go very slow & quench after each pass. Someday I will get all those blanks, but I have too much other work at the moment.
Dale