Hi

Predicting that whether you will get a government medical college or not with 400  marks required  is quite difficult but when we go through previous year trends then

In neet 2019 , 426 marks was the cutoff marks for OBC category under Karnataka State quota to get a seat in Government Medical College and it was for Kodagu Institute of Medical Sciences, MADIKERI

Now,

There's 15% horizontal reservation for government seats for rural candidate and also 5 % reservation horizontal reservation for Kannada medium students.

But,

cut off marks for medical colleges keeps changing every year  depending upon various factors like  number of students that appeared in the exam, kind of marks obtained by them , toughness level of the examination, number of seats available etc.

So, considering all these factors including your reservation you should get at least 475 marks in your neet 2021 examination to get a government medical college.

And don't worry you still have decent time left for neet 2021 and you can definitely improve your score so that you can get a seat in a government medical college, focus on preparation, go well through the chapters , solve  numericals and mcqs after finishing each chapter , follow a timetable   to avoid wastage of time and once you are  done with your neet syllabus focus  on  revision  and  then  go through previous  year  question papers and mock test papers.

Thank you