Yep, and that's pretty much my point. People often use these connectors for breadboarding circuits. So many different vendors sell "DuPont" connectors of varyin

Yep, and that's pretty much my point. People often use these connectors for breadboarding circuits. So many different vendors sell "DuPont" connectors of varying qualities. To save myself from any trouble with these connectors, I simply don't use them and opt for 22 gauge solid core wire directly. Ben Eater has a good video on the way he creates breadboard circuits, though his organization is a bit extreme for when you're prototyping. But in either case, you can use solid core wire directly and save yourself a lot of trouble. https://www.youtube.com/watch?v=PE-_rJqvDhQ https://www.youtube.com/watch?v=PE-_rJqvDhQ