The 7MM WSM will not outshoot the other two if you use bullets with equal Sectional Density for each caliber. That doesn't mean that there is anything wrong with any of them. Its just that when you compare, you have to give them all a fair shake. I don't have the figures in front of me but you would prabably need to use the 130 or 140 for the 270 and the 165 0r 180 for the 300 to get equal SD's to compare the three.

I get plenty of performance from the standard 270, 280 and 308 for my needs but I did consider the 300 WSM and still have it in the back of my mind. I just need to think of a logical reason for the purchase. (Besides I want One)Since I am retired, the wife brings in more income that I do so she gets to vote.