514 is a good score but it's not gonna open as many doors as you think. I applied with a 34 (which, the year I took the mcat, was equivalent to a 514) and a 3.15 gpa (both s and c). I had downright impressive ECs and LORs (not giving away much, but let's just says it's the kind of ECs that admissions officers salivate over - an Adcom's words, not mine). I applied to 15-18 DO schools, got 2 interview, and was waitlisted twice. The fact is, osteopathic schools tend to put more stock in GPA than the MCAT, and I can't say I blame them. A high GPA/low mcat combo will take you much farther in DO applications than the opposite.
Make sure to apply to the Touros. They tend to take more high mcat/low GPA candidates (like me and many of my classmates!)
With your stats you'll probably get a few interviews. But imo your chance at acceptance is 50/50.
That being said, ALOT of this comes down to your geography and race. A black guy from the Midwest is gonna have better luck than an Asian guy from California.
If you're not accepted, you should do a masters program. Grad GPA will make up for low undergrad, IF YOU CRUSH IT.