It has been a pretty long term situation. I've heard second-hand that Winchester is going to offer WSM brass "soon." I've been hearing it for a while, haven't seen it, neither have the people who have been saying it.
I used to be a winchester brass snob ... winchester or nothing. The last batch of 7mm-08 I bought was awful and the '06 a friend bought (both around end of summer, so most recent production) was worse. My primer pockets are wildly inconsistent. Some of his cases won't even hold a primer in unfired brass. I may have to switch to Lapua or Norma if I'm going to keep the rifle I bought.
Given that, first thing I'd do is think twice about buying any WSM-chambered rifle and definitely NOT do it unless I was willing to pay for either Norma or Nosler brass.
Probably not what you wanted to hear.
Tom
