Update,
I did some checking on my Norco and found the extractor didn't fit the bore very tightly at the back of the slide. I swapped in a Brownell's 'House Brand' extractor I had on the bench and had to open the slot to get the EGW FPS to slide through it. I ended up with a smooth, press fit. It didn't fit as tight as in my 1927 Colt-Hartford Argentine, but it was much better than the Norco extractor with a much wider hook.
I meausured the pad on the old extractor at .1085" with a very rough and uneven surface. However, this gave very good outboard movement, bringing the floor of the hook almost dead-even with the breech block when a case was seated. The new extractor measured .113" so I began reducing the diameter of the pad until I arrived at a very slick and smooth 0.1075", finishing up with a file wrapped with 600# sandpaper.
I shaped the nose to clear both fired and unfired brass and tested this with several different brands of ammunition to ensure it would clear in every instance.
I then tensioned the extractor to hold a loaded cartridge against the breechface with light shaking, but more vigorous shaking would dislodge it. An empty case is held against all shaking.
Back to the range....Robert
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