I sent a WSSM back for a customer a while back that shot as you describe. They promptly sent us a list to have him choose a rifle from as a replacement. He's much happier with his 25-06 extreme weather. That's great customer service considering the WSSM was a New Haven gun and they don't make them anymore.
Another guy a couple years ago with a 325wsm featherweight that shot 3" groups received a new barrel and test targets.
Give them a call, I think they'll treat you right.
