Don't forget the ever-popular 260 AAR... "all around rifle," that is.
Very cool.
Basically a 6.5x57 AI, 6.5-257 AI, or whatever you want to call it...
Makes PERFECT sense in an intermediate length action. 260 Rem AI in short, and 6.5-280 AI in long.
So let it be written, so let it be done...