OFFICIAL RESULTS:
I got Scott at Vortex on the phone yesterday to go through a troubleshooting procedure. He was very nice and spent close to 1/2hr with me talking about what I was seeing and going through a procedure to evaluate the scopes performance. I immediately went to the range to run through what he had suggested. When I got started I decided that I didn't have a good starting point and decided to put oft the test until I had a baseline for my rifle.
I returned home and did a complete cleaning of my rifle. Double checked mounting, torque, diopter and other possible relevant setup procedures. I returned to the range today and ran 15 fouling rounds through the rifle and began the suggested tests and firing order. After 27 rounds through the rifle over 3 different tests I can say that the scope is 100% reliable. When I had returned the scope to Vortex and the tech checked it out he had the same results. At this point I can't say for sure what the issue was but there was not an issue with the scope, quality of build or quality control. In fact Vortex went out of their way to not only stand behind their product but also stand behind me in resolving my issue.
Thank you Scott, Dave and Vortex in general for your patience and support. I really like the PST II and look forward to years of great service from it. I can't wait for my AMG's to be built and delivered.