Hi,

Frankly, 270 is a less score for a govt college in any field. You didn't mention your category, so I will answer considering a safe score. Any score above 500 is considered safe. But still don't lose heart. Let them release the rank list and then we will know in the bhms counseling as what college you may get. But if you really want a nice college, I will suggest you to continue your studies and try to score better next time. 

Good luck!