Critical Reading 11 Practice Test(PR) vs. Actual SAT score

<p>Hi, since i went to a princeton course of $1000 which i regret spending instead of self-studying, I have the 11 Practice Test for Princeton Review. I have the blue book, but i'm using that as a guage for my progress and want to save 3,3,2, for before Oct, before Jan, and before March test as practice. I hear that the 11 PT is great practice for Math and for Writing, but it is more difficult in the Critical Reading area(which i am practicing for). I did on the CR section oof Test 1 and got a 620. I was wondering how acccurate the 11 PT is in CR in accordance with the real SAT.</p>

<p>---What is the ratio is essentially what i am asking(i.e. If i get 620 on 11PT, then actually on real SAT i get 700?)</p>