Hello Dear,

Cut off depends upon the number of seats available, the difficulty level of paper and number of candidates writing the examination. And, hence varies every year depending on these factor. In Bihar there is 18% reservation for EBC category. With 513 score, it is difficult to get a government college, but you can try for government seat in Government Ayurvedic College Hospital, Patna. There is a chance you might get a seat there. For more yo can visit the link:

https://medicine.careers360.com/colleges/list-of-bams-colleges-in-bihar

.Good Luck