Dear Prem, 505 is a decent score for General Category. If you are enquiring about All India Quota, then it is tad difficult. But if you are enquiring about State Counselling, it totally depends on the State you hold domicile of. In certain States like UP and Punjab this score can get you a seat in a Government Medical College. But in States like Rajasthan and Delhi, this is quite a less score and you might only get a seat in Private Medical College. But with this score irrespective of your Category, you can get a seat in a Government Dental College. To know your chances in All India Counselling, log on to the website, go to home page, and go to medical counselling. Open Undergraduate and open composite list. From the information present there you will see you will get an idea of the pattern of previous years. It is also available in downloadable pdf format. This list will have Closing and Opening ranks along with Category ranks too.This will give you an idea of which colleges you might have a shot at. If you want to check your options in State Counselling, please do let us know your State. You can also use our College Predictor services to check your options:
https://medicine.careers360.com/neet-college-predictor?utm_source=google-search&utm_medium=paid&utm_campaign=neet-clgpd