I have a 325 WSM lefty stainless, had it just over a year now.
I like it, its weighted well, comfortable for me, the 325 WSM kicks like a 300WM or 338WM but I find the fit of the rifle to be good, and I like synthetic for a "bush gun", by that I mean something you dont worry about scratching up if your climbing through thick stuff, who cares if you scratch the stock?
What I dont like, is the bolt throw, its too close to my scope, Id like to find an aftermarket solution, lots of aftermarket tactical handles out there but nothing to bring it further from the scope. Also the bolt cycles OK, but not great, its a little sticky, doesnt jam, but really I wouldnt call it smooth. It cycles like you would expect a 5 or 600 dollar rifle bolt to cycle, not like you'd expect a 1000-1400 dollar rifle to cycle. I much prefer the bolt on my A-bolt to the savage.
If I did it again I may save some coin for another browning, but then again maybe not.
I believe there is two options for mags, short action or long action and they are not specific to caliber, and some conversion kits for detachable mags. Oh yeah, mine has an internal. Id prefer removable.
One last thing, the WSM's are fat, this means one in the tube and only a couple in the mag, to me a hunting rifle should carry at least 4 or 5 rounds.