Which ACT score to report

I took the ACT in June 2016 and again in Sept 2016. I did better on every sub score accept science on the September 2016
test which surprisedly dropped from a 31 to a 24-not sure why. As a result my composite for both tests is a 30. If a college doesn’t super score I am not sure which one is best to send, especially as on the new one my math and English, and writing subscore increased.

Well if you are STEM definitely go with the June result. Otherwise maybe better to show the 4 higher subscores for your Sept test. Obviously no issue with superscore. Are you taking the Dec test??

You could send both, even if the colleges don’t subscore. If your September math is substantially higher then it would help offset the bad science score.