First let us look at the previous year cut off for Hassan Institute of Medical Sciences for SC Category

Via All India Quota
NEET Marks - 427
NEET Rank - 58,482

Via State Quota
NEET Marks - 342
NEET Rank - 1,28,504

Keeping in mind cut off varies from year to year, you must target for a score of 450+ if you want to get admission via All India Quota or for a score of 360+ if you want to get admission via State Quota.