is there any chances of admission for 300 marks in Neet in Maharashtra?

Hello student,
You have not mentioned which category you belong to. With a score of 300, if your category is general, then the possibilities are very less for procuring a seat in the government medical colleges when comparing the results of previous years. Also, 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