Check the "extractors" on the bolt. The right hand one is the actual extractor and should have a hooked shape. The left hand one is the holder and should have more of a triangular shape which allows it to let go when the spent case contacts the little "nub" on the base plate under the bolt.
I had a #2 with the same problem and found that a previous owner had installed a right hand extractor on the left side which caused the case to hang up.
At the time I ordered a replacement from Western Gun Parts but found it didn't fit I eventually got the correct one from Denny in California but sadly he is out of business now.