I second the Walkers Game Ears and my preference is for the KDF muzzlebrakes. BUT IMHO the 300WSM doesn't need a brake. The cartridge just doesn't have enough recoil to merit a brake and the things that come with the installation and use of one. As was said, a quality Pachmeyer Decelerator or Simms/R3 pad will be MORE than enough to tame the lil stubbie.

On another note, that POC 10x40xwhatever wondertube scope you mentioned on another post will be USELESS with a brake. After you fire one shot the glass will shatter and fly out of that papertowel tube scope. Just be forewarned. Also, the Lead Sled IS a neat tool. BUT I have seen to many scopes turned to junk when fired from fixed rests that don't allow a moderate bit of movement or recoil absorption when fired. The energy has to go somewhere, the weakest link is typically the crosshairs/turret assembly of a scope. Just be careful here.

Good luck,
RA