Barrons Chem SAT Practice Tests vs. The Real Deal

Hey I know this has been asked a lot but I want to ask specifically for the Chemistry Subject Test.

The first time I took a practice test with no prior studying I got a 590. After 2 days of studying, I got a 640.
I was wondering if the Barron’s practice test for their newest edition is accurate? I want to know if it is feasible for me to score above a 700, which is my goal. Thanks in advance for the replies.