Hello, 605 marks in NEET is a good score. With this score you might het admission in most of the medical Colleges in Delhi. Following are some of the colleges with a cut off of around 600 marks for the year 2018. 

1. North Delhi Municipal Corporation Medical College, New Delhi. Cut off 562.

2. Dr. Babasaheb Ambedkar Medical College and hospital, New Delhi. Cut off 568. 

3. Lady Hardinage Medical College for Women, New Delhi. cut off 567. 

4. University College of Medical Sciences, University of Delhi, Delhi. Cut off 581. 

These are the colleges with their respective cut off for the year 2018 under the sate wise quota. Please note that the cut off marks change every year and therefore, the admission is based upon the percentile score of the student . 

I hope this information helps you. 

All the best.