Just my two cents, since no one else has answered you yet--
have you already submitted the amcas for this year? because if you haven't, i would suggest waiting until next year to apply. It's already august 4th, you don't have enough time to re-prep for the august MCAT and expect to do significantly better, and if you do worse for some reason, it will be a major red flag. It's not worth it/helpful to re-take and get a 27. Because all of the scores are looked at, you really want to aim for a 29+, you need to have a clear improvement and not a by-chance improvement.
So, if you haven't submitted your AMCAS, spend a while preparing for the MCAT again, and don't take it until you're consistently scoring over a 30 on your practice tests.
If you have already submitted your AMCAS, then I would suggest you just continue on with the application process, as you shouldn't retake if you're not sure there will be a significant improvement. You have a solid GPA, and hopefully the rest of your application will show the reasons a school should accept you. If you get interviews, be confident. Realize that by offering you an interview, the school has decided "this student is interesting enough that we are considering him/her, the whole package, even with this mcat score", and go in and show them why you're that awesome.
If you're deciding whether or not to apply still this season, I'd suggest holding off-- you want to apply when you are the strongest applicant you can possibly be. Reapplying puts you at a slight disadvantage, and you don't want to put yourself in that position in the future. Feel free to email me if I can help you with anything,
[email protected]. and good luck!