Has an AFL game ever ended 115-71?
Yes. AFL has seen a final score of 115-71 4 times. It first happened on September 17, 1921, when Melbourne beat Geelong, and most recently on June 1, 2013, when Sydney beat Essendon.
That makes 115-71 the 947th most common final score out of 6,607 that have ever occurred in AFL. One point away, 116-71 has happened 3 times and 115-72 has happened 3 times. At one point the score disappeared for 43 years, between 1943 and 1986.