Looks a little difficult with increased number of competition this year. Being a ST category as well, the cutoff for admission is 40th percentile. And the range is around 340s every year. Yes you might be surely eligible for some good private colleges in your locality for MBBS. 

Hello Aspirant,

It seems like you are curious regarding your marks and admission. The chances are less but since you belong to ST category so there's hope for a seat. However, you have not mentioned the state of residence because then there's a chance of state quota. Upon seeing last year's cut-offs the chances are very less in government colleges. Government colleges always have a high cut-off as students from all over the country and state flood the government medical colleges. But you can still go for private medical colleges for both MBBS and BDS as your chances in government college is not guaranteed. 

I hope this information helps you. Good luck!