My recommendation is to worry less about what your score is on these practice CAT tests. These best predictors are the GMATPrep ones - and even then, it's not necessarily a perfect representation of the actual test.
So the most you can worry about is just getting WHATEVER comes at you correct. You should be familiar with what to expect and the types of concepts.
More importantly, to do well, you need to be familiar with what is likely being tested, where the booby traps, where you should focus your attention, and where you should avoid wasting time.
These are small, but critical elements that add up and affect your score --
and you actually have control over these. So don't fret over things you don't have control over -- such as the specific algorithm that is used to calculate a total score for you.
That said, if you are looking for an extra practice test, many of our students at GMAT Pill report scores within +-30 points of what they get on the actual test:
https://www.gmatpill.com/gmat-practice-t ... ctice-testWe encourage you to learn more about GMAT Pill at
https://www.gmatpill.com/testimonials