Browning has a stainless Stalker with the box mag that is mounted to a hinged floor plate and that might be as close as I get for under $700. The Christianson Arms has that same Browning with a carbon-wrapped barrel for $1,500 in either 300 WSM or UM. I've heard and read that the 300 WSM is very accurate due to the case shape (35 degree shoulder) and that design also helps with efficiency use of powder as well.
Anyone have good info on good handloads for the WSM? I would probably use a 180g Partition. What speeds are you getting with that load?
Power
http://www.powerandfury.net/hunt.html