The cutoff marks for the OBC category for the karnataka govt. medical collges for the year 2018 were 338 with the rank 134520 in the state quota seat. So your rank is higher than the rank mentioned above and you will be able to get the govt. medical or dental college in karnataka with your category reservation.   Go through the link below to know further about the cutoff marks for the karnataka medical and dental colleges.

https://medicine.careers360.com/articles/neet-cutoff-karnataka