RE: 300 WSM and 300 Win Mag.
It is really a matter of personnal preference. It doesn't make any difference if one is 100 fps faster the animal will never know the difference. Both are great rounds and it is more a choice if you want a shorter action or a long one. Each one has a it's own advantages. We have a ruger #1 in .300 WM and it shoots great and if I got another one I would probably get the .325 WSM. It has the ballastics of the .300 but can shoot a little heavier bullet.