I'm currently building and .264 Win Mag (26" BBL). Ive always had this thing for the cartridge. Ive noticed alot of buzz around the WSM series of cartridges and wildcat versions of them. Alot of folk say that the WSM's can't actually match velocities that the regular magnums produce. When comparing the 6.5 WSM to the .264 I ran into what seemed to be obvious differences. The 6.5 WSM has slightly less case capacity. The 6.5 WSM has a shorter neck therefore the bullet would seat deeper furthur reducing case capacity. Maybe theres something I missed, I can't see how the WSM could actually match my 264. Anyone care to fill me in.