To add to what Calvin has said, even with a ball drilled for you if you don't have a consistent release you may not have an accurately measurable PAP.
I have a customer who has been bowling for some time but doesn't have very good form. She wanted a new reactive ball so I had her roll one of her current balls to measure her PAP. After way too much time spent moving the tape, measuring again, moving the tape, etc, I had to tell her that her release was not very consistent and her PAP kept changing because of that. So even if you have a ball drilled for you and even if you have been bowling for some time, without a consistent release it may not be possible to accurately measure your PAP.
And to add one more facet, your PAP can change over time should you develop a stronger or weaker release. I've been working on my own release over the last 2 years and have changed my PAP a little, I don't have my measurement in front of me but my horizontal measurement has increased by about 1/4" or 3/8" and the vertical measurement dropped by about 1/2". So even if you know your PAP if it's been a few years since it was measured you might want to have it checked again, unless you are sure you are still releasing the ball the same.
USBC Bronze Coach