It's hard to assess chances without an MCAT score. You look like a pretty good applicant so far, however. Your GPA is hovering about average, but your work/experiences look pretty exceptional, which should help you stand out.
I want to emphasize that schools tend to look at your entire package. You want to make all the parts of your application as reasonably strong as possible; therefore, aim high on your MCAT. Instead of calibrating your MCAT around a particular school, I would suggest that you score as high as you are able to do. This will likely open up more options for you. However, that said, you can get somewhat of an idea of what schools are expecting by looking at the average MCAT score for a matriculant at the school you are interested in applying (the
MSAR provides this information for allopathic medical schools and the average MCAT scores for osteopathic medical schools are listed at this
link; also check the websites of the individual medical schools). Allopathic medical schools tend to have higher MCAT averages (which is around 30, for the average allopathic matriculant), so I suggest that you look at scoring 30+ on your MCAT to have a decent shot at them, and if you do so, it should place you significantly above average for osteopathic medical schools (which is around 25, for the average osteopathic matriculant). Basically, in my opinion, shooting for a 30+ on your MCAT will place you in a good position.
Keep in mind that most osteopathic medical schools want a letter of recommendation from a physician, with a preference towards a letter from a DO, although many are also okay with a letter from an MD. Some schools require a letter from a DO, however.
Same advice as I give everyone: apply early and broadly.