[calljack]

Of course there is physical contact. The bullet is in the chamber touching something or else the slug would go forward and the casing would go backward. The bullet goes forward and the backward force is transferred through the casing into the firearm mechanism, some of which might be used to activate a semi auto feature and the rest going into your wrist or your shoulder.

[neverdem]

Of course there is physical contact.

Between the black hole are the star? There's a gravitational force field, but that's about it.