Knee-jerk reactions suggesting the FCD is automatically 'good' or 'bad' based on our own limited experience are missing the point of the tool; it's designed to produce ammo that will chamber and function every time and it does that quite well. My needs don't automatically indicate what everyone else needs; if the components are always 'good' then the die won't do a thing but if anything is too large the die will make it smaller and loading skill isn't the issue. Combine a fat bullet with a thick case and we can easily have difficuly seating in a tight chamber; that's what the FCD is all about. If everything adds up 'right' or 'wrong' depends on a lot more than reloading skill - it's just luck and the FCD insures that if our luck is bad our ammo will still feed and fire.
The Lee pistol FCD is a special tool; if we need it we need it bad, if we don't need it we don't need it at all but it rarely does any harm. What determines if we actually need the FCD is the diameter of our own chamber(s), the diameter of our own bullets and the thickness of our own specific case walls. Most cases are thin enough to permit using fat bullets sucessfully in most chambers but that's no certainty, the tolerences can indeed randomly stack wrong and there's no 'adjustment' we can make that will make everything work great everytime. Those of us with fat chambers rarely need the help of an FCD but there's no way we can predict the thickness of our cases and there's nothing we can (reasonably) do to make them thinner. Using significantly over-sized cast bullets is the current rage; that may not actually be helpful but it IS a common practice.
Bottom line, striving to make myself and my situation the center of the reloading world by "wisely" disparaging the needs and reloading skills of others would not only be pointless, it would be wrong to the point of being foolish. Everyone should be allowed to use what he knows he needs without me suggesting he's foolish for having needs different from mine. (I may BE a fool but I'm not going to insist on exposing my foolishness to the world!)
Very well articulated
Puts the good/bad thing in perspective.