He,

Congratulations for your performance in NEET2021.

As you mentioned that you got 315 marks in NEET 2021.

In government medical Colleges of Karnataka your chance is very low for BAMS. But you have a high chance to get a BAMS seat in a decent private medical College.

You can also predict your college:

https://medicine.careers360.com/neet-college-predictor

Thank you