Normally, everyone takes 500 or 500+ to secure a govt MBBS seat…(Not for private college, for pvt. mostly it is too less than govt.)

But it too depends on the all India cut off for all India quota seats n then state wise cut off for 85% state quota seats…

After this, most likely, ur state wise merit list, the no. of candidates in ur competition n the no. of candidates in category's competition,n the seats for that category.. .all these… also matters …

Other than ur marks, these things matters too, n only these r the things, which can make the cut off of 450 n above up-to 600–650 marks...

Nobody knows, what will the next, but the approach should be of minimum 500 to 550+ for govt seat..

All the best!!!