I think you're scoring just fine, just make sure you don't stop practicing and reviewing. However, if you want to find your weak/slow points, something that helped me was doing 15 of each type of PA question on the generators (trying to simulate exam style) and timing each of those. For example, do 15 keyholes, stop the timer and write it down. Do 15 TFE, stop the timer and write it down. Etc. In the end, my experience has been that I'd have 2-7 minutes "left" based on total time. However, the goal is really to see where you're getting hung up and how much time you're spending per type of question. It really helped me, hope it helps you.