Well the chances are pretty rough as a general candidate needs to score more than 550 in order to get admission into any government medical college. Admission in the top ones might be an issue but you can get a seat in some lower government college. You can check what colleges you can get with this rank by going through the link of NEET College predictor tool given below.

https://medicine.careers360.com/neet-college-predictor

Thank you.

Hope it helps.