000Robert
Platinum Member
- Joined
- Mar 28, 2020
- Messages
- 6,427
That old 425M was well known for being more difficult to sharpen while not holding an edge any better than the current 420HC. It is probably the carbide size, as a guess. It can be chippy and that is what makes me think that. Still, it is not too difficult to sharpen. Buck used to put an odd convex edge on their knives. It would get thin and then thicken out behind the edge. This made the knives a bit more durable in use. However, when people tried to sharpen them, they would inevitably hit the blade stock where it thickens out and not the edge. Then they would think it was hard to sharpen.
I'll take your word for it. All I know is that my Hall's stones would not even scratch the steel. I have a 180X twin boom AmScope. Even looking at it under my microscope I couldn't see a scratch on the edges after sharpening 30 or 40 passes. But it's nothing that my DMT or Wicked Edge stones can't handle.