Having killed a number of big game with both the 7mm mag, and the 300 WM I would go with the 300. I have had mine since 1970 and have hunted extensively with it. I believe that I can see a difference in the reaction animals have to both these cartridges. Based on field experience , the animals I have killed with the 7mm seem to wander around more, and take a second shot more often. This is what I have seen, others will undoubtedly see differently, but my sample is on over 100 head of big game.
