Neither? Are you looking to build a rifle or buy a used one? I think the 6.5-284 would be one to consider.....if so. I know you can still find .264 win mag ammo on shelves, though not popular, some guys still love em I know, and I guess are keeping it alive? I've never seen 6.5-06 ammo.

I know the 6.5-284 is quite a popular long range target round......who konws maybe itll be adopted in the future.