My first score on a practice exam was 505 and my actual MCAT score 3 months later was a 521, with a 132 on CARS, 131 on Behavioral Science, 130 on Biology/Biochemistry and 128 on Chemistry/Physics. Your goal is achievable. I put in 400 hours of study, took 12 full length practice exams, used the Berkeley Review with Next Step MCAT exams and of course the AAMC full package. Save your Sample exam for a week before the test because its not graded and so you can get practice without panic at the last week (at which time there is not enough room to improve significantly. I highly recommend spending 4 hours or so to review of each practice test result, analyzing trends in what you got wrong, and working on your weaknesses to get the most gain. I also studied CARS about 2 hours a day and then 6-10 hours a day on the other subjects, starting out lighter and winding up at 12 hours a day in the last 2 weeks because most of it was taking tests and examining results. I also bought additional flash cards because the AAMC cards are just too few in number. Bear in mind at least when I took the test, a 521 landed me at the 99% tile result, which got me into 2 medical schools and I made 2 other interviews at top 10 schools as well, and I received one full tuition scholarship offer out of the 2 schools where I was accepted. My MCAT score and grades were good enough to get into anywhere, but I just frankly didn't have the number of volunteer, physician shadowing, and research hours that top 20 schools expect, and yet I still got interviews at 2 top 10 schools with my MCAT score. My cousin scored similarly and went to LSU dental school, and he told me he took 20 practice exams, so overall that is my suggestion. You really can't take enough practice exams, and I suggest doing it under timing exactly like the real MCAT. In fact, I went so far as to eat the same snacks, drinks, and even used the same whiteboard and marker as used on the real MCAT then I stayed in a hotel overnight next door to where I took the test the next day so I could get the most sleep possible, which truthfully wasn't much due to pretest anxiety. In fact, I threw up the morning of the test due to slamming an Ensure took quickly and the pre-test anxiety, and I still scored a 521, which was higher than any of my practice tests, which I found seemed harder than the actual MCAT (except the AAMCs of course which are the real test). I am now in medical school as an MS1 so hope that helped you.