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I was the "heat treat guy" at a machine shop where I worked. Everything I knew I learned from a machinist book on heat treating and Blade magazine. We had a Rockwell tester and it had another setting on it as well as a Brinell scale tester. I believe the other setting was "d" and we never used it as it was never specified. I only ever used the Rc scale and it does have 0.1 tenth decimals in the "c" range. It would be an awful knife for skinning if it was that soft. My Gerber pocket knife was Rc 54 so 44.8 would be better used as a throwing knife.
There are no hardness scales that I'm aware of where 44.8 is very hard. Brinell for instance which is used mostly for minerals 50 Rc would be about 490 Brinell.
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