q,
When is your test date?
Usually, it's a good strategy to take the powerprep cats a day or two prior to the actual test, because it can tend to boost your ego, and calm the nerves. I hope you did not take the PP exams to early.
If you had taken the PP tests without studying the OG, your PP score may well be an excellent indicator of your scoring capability on test day. If in fact you studied the OG prior to taking the PP cats, your score may be scewed.
It's a rather controversial issue when it comes to the correlation between PP scores and actual exam scores. Unfortunately, there isn't a guarantee that you will score near, above or below your PP scores. Experiences vary.
If your scoring 700 on PP, your actual might be a little lower (high 600s).
The actual tends to be a little harder than the PP cats, and when you factor in nerves, and such it can affect performance.
Again, experiences vary. There are people that score 700 in PP, and score higher in the actual.
Since you took the PP cat under noisey conditions, try taking the second PP under simulated testing conditions. Make sure you do the essay first, don't skip it, and only take the 5 minute break after the math part. Do not exceed the break limits.
See how u do.
Keep us posted.
Best of luck to you.