Can you post a pic or two of the extractor? Also, Have him break it down and THOROUGHLY clean it, paying special attention to the bolt. Use carb/choke cleaner and use it liberally to flush out the parts, as there is likely either a build up of Kosmoline, which was never cleaned from the gun from when it was new or the extractor or extractor spring is worn.
Big Al's "Take-Em" Style Silhoutte Decoy Pro-Staff.
N.O. Outdoors Guide Service, President and CEO. "You try harder so we don't have to."
Don't do anything you wouldn't want to admit to the paramedics after.