Hello,  a score of 300-350 marks can get you a medical seat in private colleges in OBC quota. But different state private colleges have different cut off mark lists for admission into different medical courses. Also, different colleges have different fee structure and different admission procedures. However, proper information about the desired medical course and the state in which u want to get admission will help me guide u in a better way.

All the best!

Hello dear !
The state which you belong to plays a vital role in what sort of medical colleges you can get . So mention the state to know it precisely .
According to the past statistics , you've a moderate probability of getting into private colleges .
You can mostly ensure a seat through management quota for your marks . You can predict the college using the link given .
https://medicine.careers360.com/neet-college-predictor
Hope it helps :)