I posted earlier about FTE concerns with my Shield. One member suggested maybe I was getting too much pressure from the fully loaded magazine. So today, with an empty chamber and the safety on, I inserted a fully loaded magazine into the gun and pulled the slide back an inch or so...and it just stayed there.

If I loaded the mag minus one of full capacity, it would snap back into battery every time.

Is this by design? Seems like a full magazine may be slowing down my slide?

Thanks