I recently replaced the extractor in my Norinco 1911 with a Wilson Combat "Bulletproof" extractor (along with a matching "Bulletproof" FPS) and I originally adjusted it using the "shake" method. Extraction seemed fine but, on a full magazine (Wilson Combat 8 round or the factory mag.) the first round would fail to go fully into battery. The round would enter the barrel, but the slide would fail to go the last 1/2 to 3/4". I could tap the rear of the slide and the gun would return to battery. At this point I am thinking that the extractor might have a bit too much tension and that the rear of the round was hanging up as it tried to slip under the extractor hook. I saw another video (see below) where the tension is calibrated using weights. Checking the tension on my extractor would seem to indicate that I have about 1 pound of tension compared to the video's recommended 2+ pounds. Which would seem to argue against my extractor having too much tension (even though it easily passed the "shake" test). Are the suggestions in this video more helpful and accurate than adjusting the tension using the "shake" method? [ame="http://www.youtube.com/watch?v=EpqEgTA90Vg"]1911 Extractor Tension: Measuring and Tuning - YouTube[/ame] Am I heading down the wrong path here? Thanks, in advance, for taking the time to read this and for any suggestions you might have! p.s.: The factory magazine has a new Wolff spring in it. The recoil spring is also a new Wolff spring.