With the development of the wsm's being as successful as they are. I'm curious if Winchester is in the development stages of a 338 on the same case.
My 300 can throw 200gr at a very affective velocity, around 2800fps. I don't see any reason a 338wsm couldn't throw 250grs at 2500 - 2600fps, possibly more with a 24 inch barrel and no belt to deal with. There wouldn't be any advantage over any thing that already exists, but the rifle could be built an inch or three shorter, lighter and handier. Recoil could be some thing that would have to be dealt with. Ouch. It would, most definitely, not be an every day shooter.
These long range target shooters are drooling on the wsm's cases wanting the development of a .264 size on the same case.