OP, do you have any 700+ subject test scores? A 31 ACT is pretty border line for Bowdoin especially without a hook- in fact the admissions officer essentially suggested my D not submit her 31 last year (if she were to apply) and my D wouldn’t have submitted since she had some good subject test scores and very strong GPA/rigor. So when deciding to submit or not submit a 31 you want to take the rest of your application into context and determine if the 31 supports your application or detracts from it. In my Ds case it would have detracted. Not that 31 isn’t a great score, it’s just that Bowdoin is test optional and the median score is more like 32.