I sort of figured it'd be that stuff. 420HC is a manufacturer's name; in other words it's not a formal AISI steel classification. There are roughly 10 versions of 420 out there, of which a good number(most) don't even classify as martensetic(heat treatable) steels due to their carbon levels being below .40%. The #10 version does have sufficient carbon and may be what is being called 420HC. It's actually quite similar to the old 425M steel that Buck(who started this whole 420HC thing) used for years. While I don't have a knife in 420HC, I do have an older Buck in 425M. I haven't used it in years, but I did do a few deer with it, and the edge lasted long enough to gut and skin a deer. It would stay sharp long enough to also partially butcher it out, but lost it's usable edge about halfway through. In other words, it'll do a deer, but it's simply not in the same class as far as edge holding goes with many of the other stainless steels I've used; which would be 440A, 440C, BG-42, ats-34, 154CM and S-30V. It's used because it's cheap and easy to work compared to the better steels, and when it comes to factory knives that is most usually the bottom line.