Kraven’s aforementioned code of honor prevents him from attacking Spider-Man any further as he had already succeeded in claiming him, even if it was not permanent.
That is, until he is magically resurrected by his wife, Sasha, in The Amazing Spider-Man #635.
In the same storyline, Peter Parker awakens from his tranquilizer dart-induced slumber and emerges from his grave after two weeks underground.
The webslinger leaves his enemy be, at which point Kraven takes a rifle, points it at himself, and ensures that this would, indeed, be his “last hunt.”