The recoil a Weatherby Vanguard chambered in .300 Weatherby Magnum has a recoil of 39.2 ft.-lbs. This put a hurting on my shoulder. I installed the new stock and put a few rounds down range. Blackhawk claims up to 85% reduction in recoil. I don't know what it was, but it was significantly less. No more pain. Be careful not to put your eye up on your scope or you will be getting stitches in a perfect circle around your eye.
Pros: You don't have to be a gun smith to install.
This review was written in the old system and had content requirements that are different than reviews written today.