Hi. Congratulations on your brother's score. I believe a score of 525 is good enough to grab him a government seat, considering he has reservation too. However, this only on predictory basis as cut offs vary every year. I am listing the names of government medical colleges in Andhra Pradesh, with their cut off for BCE category-

1. Andhra Medical College, Vizag- 540

2. Guntur Medical College, Guntur- 527

3. Rangaraya Medical College, Kakinada- 517

4. Government Medical College, Anantpur- 533

5. AC SR Government Medical College, Nellore- 522

6. RIMS, Ongole- 505

7. RIMS, Kadapa- 526

If not possible in government, he can try for private ones as well, in Category A seats as he has Andhra Pradesh domicile-

1. Rajiv Gandhi Institute of Medical Sciences, Ongole- 505

2. NRI Medical College- 499

3. Pinnamaneni institute of medical sciences- 457

4. PES institute of medical sciences- 495

5. Viswabharati medical college, Kurnool- 489

Hope it helps! All the best.