Acquired a 1 Grade extractor gun today, and the forend is a bit too easy to separate than I'm comfortable with. I had the front end of a little .410 single shot fly off once: pulled down to open the gun and the forend, then barrel, both decided to fly off the front and 6ft down to the ground below the shooting deck. Not gun.
What is the proper procedure to tighten up the iron so that there's a little more pressure required to remove the forend?