Lastly, it it has a bullet diameter of 6.5mm, and despite the widespread adulation of 6.5s beyond North America’s shores, these cartridges—whether called 6.5 or .260 or .264—have never done well with American shooters. This is a shame because some damn fine rounds have been crippled by this bias. The 6.5 Remington Magnum never really got out of the starting gate, and the attempts to revive it were complete failures. The .264 Win. Mag. is a hot round with impressive ballistics, but it was overshadowed by the 7mm Rem. Mag. and never gained widespread popularity.