Hi AEG, mjr,
This is a very tough subject because PSA readings are so varied and every person's case is different. I did a find link that may be useful, discussing post RP PSAs here:
Look under the "PSA Monitoring" section.
I hope this helps!
"Idaho" ~ Barry
Da Vinci Surgery July 31, 2007… 54 on surgery day
PSA 4.3 Gleason 3+3=6 T2a Confined to Prostate
1st PSA 0.04 (undetectable) 9/11/2007