Harry, with appropriate respect for your age and proclaimed gunsmithing skills, you don't know what the heck you're talking about! The screw in question reduces the trigger pull weight, by reducing the tension on the trigger return spring. Has absolutely nothing to do with engagement, as long as he doesn't go below 3# or so.
I've read your similar silliness about adjusting Remington triggers, the instructions for which were included with Remington rifles, many years ago.