Neet examination is an all India level common entrance examination through which medical aspirants were eligible for the undergraduate courses in both private and government colleges.

The admissions into any bams colleges is based on neet marks.

It would have been helpful if you have given us your category as the admissions will also be based on different types of categories. 

The cutoff for all these colleges is always based on different factors like category, difficulty of the paper, no of the students have written and so on. But I'll give you general information 

There are three types of colleges

Government 

Semi government 

Private

For government colleges it is 420+ for general and 400+ for obc

For semi funded colleges is 400+ for general and 350+ for obc

For private colleges, the cutoff marks is 300 for general and 290 for obc and 250 for sc and st

So with your marks, you'll be able to get into major and prominent colleges not only in bihar but also all over India

For more accurate information please check the link below 

https://medicine.careers360.com/neet-college-predictor?icn=NEET_clgpd&ici=sticky-qna-wap

Goodluck.