I honestly did not think I could break into the 170's. But on Friday I scored 174 on PT 76.
I just let go of the results of each test and did my best to BR every test.
Something that really helped me was BRing the next day. I was too excited to check my score and so the bulk of my br's were sloppy. Once I did that I got a few 169's and lo and behold
I would say I was around 175 BR once I finished the Core Curriculum. I just listened to what @jhaldy10325 had to say about learning the material and not focusing too much on numbers. I occasionally went back to the CC for drills and brush ups but the majority of time between PT's was spent on drilling sections.
Hope this helps!