I made a new one a couple days ago out of the same spring. First I heated it up to yellow, then put it in some sand to cool. A few hours later I pulled it out and re-heated it and forged it straight and put the taper in. After forging, I let it get yellow again, and turned off the gas, closed the forge, and waited till the next day. That was the normalizing step right? After this step, I brought it up to non-mag, and quenched in used fryer oil using a swirling motion. Then I set it on top of my forge hood for a while until it showed some bluing.
Just to test it out, I chucked it up in the vise, and smacked it with a hammer. The vise would not hold it. I think it was because I had the taper in the jaws. Today I will put the round part in the jaws and try to break it off.