Reading this reminds me of the OM 357 that had the cylinder bored out to accept a 44 mag cartridge that was necked down to accept the 357 mag bullet… I recall it was called the 357 B&D (Baines and Davis?)….
I think it was comparable to the 357 Max but I don’t have my cartridges book around to look. Maybe coogs has some ballistic info comparison….
When I talked to Mitch Schultz about adapting one to 41 mag, we also talked about the 357 b&d for a minute but being the 41 nut I am, it was more focused on that….