There is a lot of revisionist history concerning the 264 Win Mag. Mainly by those that are not old enough to remember when all the hoopla began.
The simple fact was, Winchester overhyped the cartridge from the beginning, giving unrealistic velocity figures for the components of the time and not telling the buying public, and shooting editors of magazines, that their data was garnered from test barrels in a length that was never going to appear in an over the counter rifle.
Things are different now. You have a high capacity case that with the components available today, can go head to head with any .6.5 out there.
Unless you just cannot stand seeing a Belt on the head of a cartridge.