Took the PST back out today on the Creedmoor to put some more rounds through the rifle and do a tracking test. Only went to 9 mils as that was all the cardboard I had on hand but it tracked on. When I shoot a test and I am within a tenth of a mil I call it good. Have done it this way for years and it has held true in use. I also checked the reticle subtension and laid the reticle over the board and the reticle subtended on.
My last groups from the other day were a little right and I just left it there so the tracking test shots are a little right as well. Below is are pics of the board and a target which was where the last shot was when I dialed back down to 0. It was right on in return to zero. I had shot 8 twice as the first shot I felt I had the rifle canted a little when the shot broke, which was the farthest out shot, so after I shot 9 I dialed back to 8 and shot the second shot, the closer one.
I had spun the knobs a few times up to top and back down the other day to see if there would be any shift from running the knobs, which there shouldn't be, and my first shots today were where they were the other day so no shift.
This is the last target in the test. After the 9 mils I dialed back to 0 and shot this target. As I stated the zero was a little right.