Hello Aspirant,
You admission possibility will vary with number of seats available, number of applicants , the difficulty level of the exam etc. Based on the previous year cutoff trends for OBC category 350+ is a minimum safe score for government seat. And given that this time the NEET cutoffs have gone up , based on the competition level in Karnataka state your chances may vary . However on a general sense , for government BAMS seat , 306 seems low . You may try for private colleges or try for other ayush courses.
Use the college NEET predictor tool to know you possibility:
https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer
All the best
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