I remember one PS section (Kaplan Full Length 3 I believe). I got 39/52 (75%) which translated to a 13. But each test is scaled differently for Kaplan. I think 75% on Kaplans Full Length #1 was around a 9 or 10 for PS. Same thing would happen with the other sections.
The most reflective raw to scale score conversion would probably be from an aamc test since many believe that Kaplan's scaled scores are inflated.