Has an AFL game ever ended 103-48?
Exactly once. On June 17, 1944, Carlton beat St Kilda 103-48, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 103-48 in league history.
That makes 103-48 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 104-48 has happened 1 times and 103-49 has happened 4 times.