Princeton Review's practice tests (writing sections)

<p>Hi, recently i spent this month preparing for the writing section of the SAT. I did really bad on the psat (43), and now i retook an old psat and got a 78. So i also bought a princeton review 11 practice tests. I usually get score ranges from 690s-730s to 740s-780s, i assume i get a 10 on the essay since thats what i usually get (trying to get it up). My question is i usually get 6 to 7 wrong on the mc, now i recently took a collegeboard practice test and got 3 wrong. so is the PR's practices more difficult than the collegeboard's? I only got 1 wrong on idiom and the other 2 on tense which i suck but am getting the hang of it. Other than that the Real SAT practice tests are ridiculously easy. What should my writing sscore look like on test day?</p>