Has an AFL game ever ended 30-16?
Exactly once. On June 10, 1899, Essendon beat Melbourne 30-16, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 30-16 in league history.
That makes 30-16 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 31-16 has happened never and 30-17 has happened 1 times.