Is that the one where Oswald shoots JFK with Arlen Specter's magic bullet? That's always been a crowd favorite.
Shooting JFK isn't the problem, It's straight in and through, nicking the spinal column on the way.
If you want to "debunk the nagic bullet", you have to come up with an alternative theory on how Governor Connolly's wounds were caused.
Nothing magic about it. Extensive tests have replicated the exact characteristics of the bullet, which was deformed on its tip, not “pristine” as the propagandists describe it, and the path the round would take when passing through fleshy parts of the body without hitting bone till it shattered Connelly’s wrist, at a reduced velocity due to striking JFK first. Furthermore, the oblong wound in Connelly’s back is consistent with it tumbling after striking something, or in this case, someone else, first.