The old timer at the hammer-in said my forge was running too hot, and he was right
I told him 2400 was fine for mild steel but he just shook his head and told me to turn it down to 2100 for my knife blanks. Last week I tried it on a batch of 1084, and the grain structure came out so much tighter that I actually felt dumb for arguing.
Man, I don't know about all that. 300 degrees sounds like the kind of thing you'd only notice if you're really squinting at the grain, you know? Did you actually test the blade or are we just going off what it looks like under a loupe?