I bought a used action from a forum member and as soon ad my build was complete I suffered the same symptoms. Turns out the bolt head was not the 308 (.473) that it was advertised as but instead it was a 308 (.473) left hand bolt head. After contacting the seller he explained that is the only bolt head he had to install on the bolt before shipping. Turns out the bolt heads are I identical except for the ejector plunger location.
Only if someone at the factory blundered it for you, could your problem be from the wrong bolt head.