If it were me, I would clean the chamber really well and disassemble the bolt and clean that real good as well and replace the extractor spring and the ejector spring first before I would replace the extractor (as long as the extractor face looked all right). Mine usually ejects at about the 4 oclock position, his seems to be ejecting at the 2 o'clock for the most part. I would also clean around the Piston as good as I could and then try again. Did this guy in the description happened to mention factory ammo or reloads?