The AMA rule book has instructions on how to do a proper cable crimp in the control line section. After all, what is a control line plane but a pull-pull setup using 60 foot long cables?

A reasonably snug fit of the crimp tube is most important. If its sloppy enough that it gets mashed flat rather than dimpled inward, then the crimp will fail under high stress. If diagonal cutters are used to crimp, that crimp can fail.

The wire wrapping method of cable termination shown in the AMA rule book is the best. My own destruction testing of terminations showed, unlike crimps, it produces a cable termination that is stronger than the cable.