@PetraMC I’m afraid you are right, but a raw math score of 52 (missing 6) in April 2019 was 720 and that same raw score in August 2019 was 680. That seems very quick and extreme.
The June 2018 curve was even worse, IIRC. There were a few blog posts on this topic from various test prep companies that I’m sure you can find by googling (can’t link blogs here) if you want to parse the data.
August 2018 curve was fine. Maybe that was an outlier
As far as I have been able to find data (Reddit has conversion tables from historical tests) this was the harshest math curve ever. Meaning in any other SAT math test (real or practice) I can find converse table data for (30+ of them!) missing 6 is a 700+ score. Additionally, all 10 of the sample tests on the College Board website score a 52 raw math score between 700 and 770(!) clustering around 730. I don’t know why those are not more representative. Does anyone have data on an actual curve that was more harsh? I can’t find the June 2019 curve online, but from comments it seems it was harsh as well. Not sure there is anything that can be done, but it seems in my daughter’s case she thought she met her goal (a 700+ math SAT), but the goal posts moved substantially.
August 2019 was my son’s first attempt at taking an actual SAT. Reading these posts makes me feel better about his math score now! I was hoping he would hit 700 on the math but he missed 6 as well and got 680. He is taking it again in October. I wonder if they will swing in the opposite direction and give a “nicer” curve to make up for the August one? 
@TXRunningMom Like my daughter your son had a raw math score of 52 (-6). If you look up every SAT raw math score since the new SAT since 2016 in every case (10+ tests) that is between a 700 (one case) ranging up to 770 (one case) with the rest clustered between them. Unfortunately, this likely my daughter’s last test as she had been working for a year toward 700+. Best of luck to your son!
I took the August SAT and missed two math questions and got a 750. At first glance, I honestly considered opting for score verification. Although I do understand that different test dates result in different raw-to-scale score conversions to compensate for the individual difficulties of certain tests, it puzzles me that missing three questions (which is what I missed) on a College Board practice SAT exam in the math section translates to a 760, whereas my August SAT exam translated to a 750 in the math. And just to show how much more strict the math curve is–I suck at the reading and English sections, missed TEN questions combined, and got a 700. All in all, I totally relate to all of you guys’ complaints because I’m complaining too.
I’m taking the SAT again in November and I’m aiming for 1500 at least, so any tips would be appreciated!