The correct way is to fit the screw, it should be tight.

Remove it, run the inside surface across a file, re-install, test the opening/closing. If it's still tight remove it strop it again, repeat till it's smooth opening.

Don't remove too much metal each time, as you can't put it back. That was how it was done before they went with the spring/ plunger screw.

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SWCA #2817