Variability in 170s

hey y'all I'm studying to take the exam august and I'm pretty consistently scoring in 170s (last pts were 174, 176, 168, 174, and 172) but I was wondering if there was anyway to avoid this type of score variability and be able to get to the point of reliably scoring in the mid 170s or if at this point in studying its really just a toss up on how I'll preform on any given test. Its kind of been random whether I do better on RC or LR on my recent practice tests, sometimes randomly getting -0 on RC sections and other times -4, and sometimes getting -3 or -1 on LR sections. I will add that I generally feel like I have a much stronger grip on LR than I do RC, like I understand how to get reliably get questions right much more than I do on RC.