My suggestion, GMAT Preps are an accurate estimate of your test potential, however, the scores on the G-day can range from -50 to +50 or over, depending on many other factors. I personally believe, please don't fool yourself with a Princeton-730 and instead try to understand what the GMAT is all about.
Prepare well, use this forum to the fullest, understand your weaknesses and work on them, keep your strengths tight and give the test again. Wishing you all the best.
I am AWESOME and it's gonna be LEGENDARY!!!