When you have your extractor installed in the breechblock, does it move up and down freely when you apply pressure to the claw? It should be under stiff spring pressure, but it still should move smoothly and freely. I am wondering if there is extractor binding and the claw is not fully engaging the extractor groove of the casehead. I have to ask if you cleaned out the extractor bed before installing the new extractor. That area can surely accumulate a lot of crud and lead to malfunction!! I am just thinking out loud.