That's a good enough reason for me. I've never bothered to rationalise a cartridge choice. I buy the rifle in the cartridge I want purely for interest, nostalgia or whatever you call it. All three of my .257 Roberts's are built on standard length actions (.30-06 length). Rationally, it would make more sense to turn them into .25-06s to use the wasted magazine space. But the .25-06 just doesn't grab me as the .257 Bob does. So I don't worry about it. I enjoy hunting deer with a .257 Roberts and for me, that's what it's all about.
