Hello candidate!

The score of 310 is usually sufficient to obtain admission in any one of the three Indian campuses (at Pilani, Goa and Hyderabad) as well the the Dubai campus of Birla Institute of Technology and Science, Pilani. 

Furthur more to get a better insight as to the stream and campus which you can get, try the BITSAT 2019 College Predictor by Careers360 whose link I have enclosed below.

https://www.careers360.com/bitsat-college-predictor

Hey there

You have chances of getting Pilani campus with lower branches and Hyderabad campus with good branches check you the previous year cutoff at 

Web results

BITSAT Cutoff 2019 – Check Previous Year Cutoffs - Engineering - Careers360

https://engineering.careers360.com › ...

Good luck