Dave93, Sunny Hill or Swift Bullet Company's Blackburn bottom metal. Never had a Blackburn, but from the looks of this one for .30-06 (image posted by another happy camper here) the similar for 7mmRM to .458WM ought to be built like the Duane Wiebe stuff that I have tried:
That will add some weight to Mahohbesta, in a well balanced manner.
I have 2, maybe more, at least 2ea, pieces of Swift M70 stainless bottom metal.
My less than happy story. It took so long to get them, I forgot that I ordered them. I am talking like a year or more. I never called to inquire after the first 6 month period. Pretty much figured screw it. Plus, before I ordered-- I was told by "a guy" that builds / does metal work on pretty high end custom rifles - I might regret my choice.- Not because of functionality, but the real unfinished state of tool marks. He told me that he sent some back. -- Well, perhaps they sent me his over a year later. Mine are certainly not light polish or bead blast and play. Hell, I ended up ordering and using PT&G. Maybe, one of these days I will do some File work to these Swift bottom metals. The exterior looks nothing like these pictures. And these was Long before the chinese bat flu. I should have sent these back. Not what I would call a finished product.