Hi simonden4,
The only practical way to assess your GMAT skills - and how you might score on the Official GMAT is to take a FULL-LENGTH CAT under realistic conditions (re: taking the FULL CAT - with the Essay and IR sections, away from your home, at the same time of day as when you'll take the Official GMAT, etc.). Unfortunately, taking an individual section of the Exam - outside of the context of taking a full, adaptive Test - has a higher potential to lead to inaccurate results.
Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How many hours do you typically study each week?
2) What study materials have you used so far?
3) On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your overall goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich