The gun is not shot a whole lot but it seems like in between range sessions maybe 3-4 months I have a shift in POI.
First of all
WELCOME to HH!!
With this much time between range/practice sessions, it just could be you changing POI. Please don’t take any offense to this comment. But practice, consistent grip tension, and sight picture is paramount to constant POI.
If I go to the range and seem to be shooting low left all of a sudden I carefully analyze the next few shot and realize I’m getting sloppy, clear my head get my technique together and the POI seems to come right on with out "chasing" the scope. I have never had a scope "change" setting from storage.
I have a couple of old friction adjust Leopold’s and the one thing I have noticed is that at the time of adjustment they can ease back just a little from where you crank the dial. Like releasing a little tension, but once they are set they never move. I do like the click adjustment better.