Hello student,
With a score of 298 in the SC category, you can procure a seat in the government medical colleges when comparing the results of previous years in Karnataka. Last year, a minimum score of 283 got a seat in the Raichur medical college, Raichur in SC category under the state quota. But one thing to keep in mind is that scores and ranks vary each year with difficulty level of the question paper and availability of seats. However you can predict the colleges which you are likely to get using the given link
http://medicine.careers360.com/neet-college-predictor
Good luck