Next is a burnishing reamer for .22. The main part is made out of drill rod and turned down on the tip. The tip is then heated to red hot, quenched, cleaned and then heated to a straw color. This last part is very easy to get wrong as we use oxy-acetylene to heat it. Just a little too much heat and you have to start all over again. It took me four tries to get it right. I was a little aggressive in the cleaning (using sandpaper) after each failed attempt and managed to get the tip just a little undersized. After getting the tip to a straw color, the tip was ground down on a surface grinder. The handle is cold rolled steel and is secured to the reamer with a set screw.
Still, my grade was a 97 so I am happy!
