According to ammoguide, the 375H&H can be rechambered to 375 H&H Flanged magnum, as every dimension of the flanged case is the same as or slightly larger than the belted case. The reason I am considering this is that I want to build this cartridge on a Farquharson action and the Ruger conversion would be a good trial run. I would like to know if someone has done this conversion and can share the experience. Besides the extractor on the Ruger,is there anything else that must be changed?