Well, if the brass is lasting that long I have more good news. Over at long range shooting a very well respected gun expert is reporting that the wsm is winning big favor with long range shooters over the 300 win mag because barrels seem to be lasting 2x's and even 3x's longer although no one really seems to know why. Here's his final comment:
The 2008 IBS 1000 yard shooter of the year and Nationals champ is Danny Brooks who has been a long time Win Mag shooter. However, he won this year with a WSM that had 4000 rounds at the Nationals. No Win Mag has ever done that with half that many rounds in the tube.