Hello, 650 is a good score and has a good chance of getting admission in medical courses offered by Kasturba Medical College, Manipal. The cut off score of 2018 was in the range 490-550 for general category. Therefore, this year the cut off may be more than 550 marks. A score of 650 is a lot higher than the last year's cut off and the estimated cut off for this year, which increases the chances of admission in KMC, Manipal. 

Good luck!