I am having the same struggle. I scored a 162 on the last three PTs I have taken and after BR scored 169, 174, and 176. Clearly the gap for me comes when I am answering under timed conditions. I have been using the AI coach to help me study in a more targeted way to reach my goal score (170+ on September test). Recently the AI coach advised me to take a pause on PTs and focus solely on specific question types I am consistently missing. I have been drilling my problem question types under timed conditions and WAJing/reviewing explanations when I choose the incorrect answer. This seems to be helping me as it is made me deep dive on why/how I approach problems differently under timed vs untimed conditions. I have seen my drilling/section scores increase as I have followed the AI coach instructions. I am in no way an expert, but maybe this method of studying could help you as well! Best of luck!! Rooting for you!