I have been dissatisfied with the crimper I have, even though it seems well-made, I get the feeling it is not quite the right one for the common cheap “dupont” connectors. I seem to have gone down a rabbit hole and found what might be a better crimper and if so, I just need the right technique.
If I may ask, what crimper do you have? I might start a separate thread on what I’ve learned after my new crimper arrives.