I have replaced a number of these extractor/ejectors. The originals were hardened at the tip where they contact the ejector sear, and they need to be, in my opinion, to avoid wear which will through them out of time. What I always did was take the ejector and quickly heat ( even a propane torch would do) the very tip of the ejector to red and quench in oil. Unless you know the steel characteristics, I think it is always better to quench in oil. After an oil quench that tip is hard, above file-hard, so I would take polish the tip so I can see tempering colors, take the torch and gently heat the tip up to a tan or blue and let it cool. That way you have hardness but not too hard. I cannot tell you what type of steel they used, but this works for me. Polish off the tempering colors. I would only heat the very tip of the ejector to get the hardening and tempering. I would not want to harden the next step in the ejector, where it stops in the barrel recess.
