Hello aspirant,

You can get a seat for MBBS in private colleges through management quota with your score of 308 in Tamil Nadu. You cannot get a seat in any government colleges with this score. But you do have chances in priavate colleges without management quota also if you belong to any category other than general category. So you can proceed accordingly. To know more about which colleges you can get based on your score you can use the link of the college predictor provided below.

http://www.medicine.careers360.com/neet-college-predictor
Hope this helps,

Thank you.