I don't have a 7WSM but I do shoot its big brother. Try out the Nosler AccuBonds in it. They shoot really good out of my Browning A-Bolt 7mm. You might also want to check out the Barnes TSXs. Since your talking elk, the Nosler Partition also comes to mind.
I have a buddy that shoots the XP3s out of his 300WSM and he has nothing good to say about them.