As you have mentioned that your neet score is 300 marks but you haven't mentioned your category. Nevertheless, i am assuming to be in general category. So, if we look over previous year's cutoff trend for BAMS and BHMS then the cutoff for BAMS was 440+ marks and for BHMS it was 400+ marks. Having said that the cutoff increases every year depending on various factors like number of seats available, difficulty level of the question paper, number of candidates appearing for the examination. Do, this year again the cutoff has increased by nearby 25  marks. So, looking this cutoff your chances to get a government medical college for BAMS and BHMS is almost negligible.