Hello student on the basis of past year records I believe you need to score above 500 to secure a seat in good Goverment college through all india open category.

This year pretending cut off is bit tough as firstly it change on the basis of the number of aspirants and level of question also from this year lots of change happens like admission in AIIMS and JIPMER will also on the basis of neet marks.

So try to score good as there's around more than 3months, good marks will help you to get into good institutes as you're from Genral category and seats are very limited and admission is directly based on merit rank.

Feel free to comment if you have any doubt

Good luck