Sorry. I actually do not own a 7 WSM, I own a 270 WSM. But I'd rather a 7WSM if I did it gain. Hard to argue with the virtues of the 7mm over the .308s and the .277s.
If I were to build another rifle it would most likely be 6.5x47 Lapua, or possibly a 7-08 built around the 162gr A-max.
Here is a cool article on the 7WSM:
http://www.6mmbr.com/gunweek064.html
