Curtis Custom Helix hybrid/ terminus kratos prefit barrel interchangeablity question

[Sdvldog1371]

I have an MPA hybrid hunter with a proof carbon barrel in 300 PRC. I also have a 24" Bartlein M24 stainless barrel for it in 300 PRC. I was looking over the tenon prints for the Kratos and the Helix Hybrid and it looks like one could use a proof prefit for a Terminus Kratos on a Helix or axiom. Can anyone confirm? I can get a prefit proof for less than I can have a prefit spun up is why I ask.