By the looks of things, I have the standard small barrel diameter. I'm not sure if that would leave enough meat for .375 caliber. It certainly would clean the rifling up. I looked into the .315R. It was a listed caliber for my rifle. I suspect boring to 8mm would clean up the rifling, but would need a smith to ascertain that for me. It would require rechambering and, I assume, some modification of the action? The .315R has a large case diameter which made me question feeding issues in a .303 magazine? Also the rim diameter means opening the bolt face and extractor too. Even from what little reading I've gotten in here in the last few days, it seems the ammo can be problematic. Can you make cases from the 8x56R? I have an M95. I do reload when I have the time, and the cartridge is intriguing and certainly would be adequate for the type of hunting we do here. (Deer,Bear,Moose,Coyote/Wolf) Is there anyone with experience making this conversion? Thanks for the replies! Norman4.