I mentioned the FN 510 trigger I dry fired and measured while doing the same with my MOS G19. Both scaled 6lbs over and over no matter how I tried to find a lighter angle. Yet I'd have judged intuitively the 510 might have been 4.5 it felt so much lighter. Maybe cause I didn't perceive any "wall" whatsoever. I've not had good luck with other platforms similarly discerning a pound different than what they measured.
But take that with a grain of salt as I've never really perceived over travel either and may be a trigger moron.