What to Expect??! GmatPrep 710, 600

Practice tests are not supposed to give you insights on 'what you might score'. They are supposed to give you insights on 'how you can improve your score'. If you work on all your weak areas, you are bound to get a good score in the actual test, no matter what the practice test score says.

You already know your weak area. Try and work on that. If intuitively you are not getting the right answers, it means you need to work on an approach. There is no way around. We cannot complain about scoring low in a section if we don't want to put in the effort to improve. GMAT SC is not about 'grammar rules'. It is more about logic and meaning and knowing the basics e.g. subject and verb must agree, pronoun and antecedent must agree, modifiers must be placed correctly etc. Expose yourself to some theory that explains you what is meant by a 'logically correct' sentence. Also, practice questions that test whether you understand the logically correct option. You may know the basic rules but some sentences are just too complicated. It is hard to figure them out intuitively. you might want to break those down and check them piecemeal.