RE: browning a-bolt caliber???
I would stick to the standards 7 rem mag or 300 win, as it is very spectulatory about the data published with realtime results with regards to the WSM vs standard counterparts & ammo choice and availabilty is readily available(not to mention less expensive). The one thing it does give you is a short action with magnum boost but it does not exceed it standard brothers. However if you want a short action and mag to boot I would opt for the 300WSM. Main reason is been around the longest so it has more gun/ammo/bullet offerings (especially if you buy over the counter-factory ammo) and I think it will be one that will stand the test of time.