If I was building a 7mm to shoot the 176, I'd use the STW, Dakota or even the RUM. 3000 fps with the wsm seems light for me since its a max load. If the rifle doesn't shoot the max velocity load accurately you may end up with a 2800 or 2900 fps load. I would want to take full advantage of that load and get the max accurate velocity.
Just my two cents YMMV