Thanks again Ted,
It is definitely a crack. I can see it on under the extractor and it goes from the flat to the chamber. I'll take it to a pro and get an opinion. I am guessing this crack was there before I received this gun about 5 years ago. I have only fired it a few times and used only short shells and light loads. A freind, who has since passed on, gave it to me. He did not shoot or hunt; it was his dad's. Maybe the crack is reason the rest of the gun is in such nice shape. Dan