It won't work in his RAR rifle that he is re-barreling. Ruger hasn't offered the American rifle yet with a magnum bolt face. When and if they do then the .270 Bee would be a viable option.
I didn't even think about the bolt face not being large enough, good point. I guess it couldn't be opened up enough to allow for a magnum. Thats a heck of a cartridge though.