First of all, let me say that I just purchased a Springer R3 Enhanced, supposedly NIB, but upon field strip, was obviously used.
That may explain why the trigger set screw looked exactly like yours, protruding slightly from the trigger face.
Try this, remove your magazine,remove the slide assembly.
After removing the slide, carefully lower the hammer.
Use a flashlight, look into the magwell from above. You will see the trigger bar.
Now slowly depress the trigger, you will see the back of the trigger.
Does the set screw protrude from the rear of the trigger? Mine is not visible at all.
It should protrude enough to contact the frame after releasing the trigger, thus preventing over travel.
Here is a detailed step by step guide on adjusting the set screw:
1911 Set Screw Adjustment