If I take the October ACT 2015, will my scores come in time for the UC app?

So the October ACT is on October 24th and I know that full score reports (including writing test) takes 5-8 weeks to process. If I do take it, do you think there’ll be a problem sending it on time? I know there’s an option to select a college to send your score to when you’re registering for the ACT… should I do that?

According to the UC website, the December ACT or SAT sitting is the last sitting they will accept. The October siting is fine.