I looked it up, you are right. I stand corrected.Once more, not so.
Cobalt is also somewhat ferromagnetic.
Yeah the insert is perfect. I only wish my titanium wedding ring had the same finish.Btw, referring to carbide, tungsten polishes to a surface that is smoother than glass.. even at extreme magnification it can still be flawless. A maker can choose to create a die that is as smooth as mercury or a rough as a tater tot, it's a matter of spending a little more money, doing it right, and sacrificing a little competitive edge.
My Lyman nine, rcbs.380, and others that I have worked with have been visually perfect.