The Bear Ops Rancor II (advertised as S30V and made in USA) has been tested repeatedly with a XRF analyzer and is actually 8Cr13MoV, presumably not made in USA.
that's BAD!
I haven't had anything XRFed, but had a couple of tools that were unknown steel and someone who wanted me to arrange it got frustrated enough just took them and had them analyzed (finding out everything other than carbon was no problem).
I looked up the cost to outsiders here and some metals labs at colleges offer $20 a sample analysis. If someone tests another one of those made not at the same time and finds the same thing, that'd be extra bad.