If no one chimes in with a definite answer to your question, your next option would be to contact criterion and ask what reamer they use and if they know the freebore length.

If I had to guess,.. I doubt the freebore is long enough to seat the 230 Hybrids out passed 3.700".... To seat the Hybrids at the lands with a coal of 3.800" the chamber would need a freebore longer than 0.300"...

I think SAAMI freebore is like 0.230" ish ?

The only 300winmag pre-fit barrel I have is a Shilen and it came with 0.090" freebore ! too **** short but gets good results with all bullets, including the 240 Matchking. Even tho they're seated very deep inside the case.