Chubbs,
I don't have any info on the wsm but I do have a couple of Questions.
Who did the barrel for you? Does it have a brake? Is it stainless or blue?
I shoot the 338WinMag in a 15" SS barrel with a brake and love it. I am curious as to how the wsm will compare.
If I find any data I'll pass it your way.
Ronnie