I’ve never had a scope slip using 20. 15-16 you are asking for slip.
The only way I see a manufacturer recommendation that low, is because their tube is super thin. No other reason for it.
First thing I would do is clean it. Not that it needs it, or thats the problem, but it’s an easy step.
If no change, then mount a known good scope on it.
The nxs compacts are what you are looking for. Too bad all of the reticles except mil-r, and moar are discontinued. An Np-1 reticle would be about perfect.
That’s one of the most fragile scopes there is. A lot of them come fubar right out of the box. I have seen this firsthand, and it seems the newer the scope, the quicker it wil fail.
I just went through my barnes stash, and see what you mean about the revision. It’s next to the bar code. Only 2 boxes had the revision. 7/19, and 7/20. The bullets have no x. 110 ttsx 30 cal, and 6.5 127 Lrx.
I’m not saying they do this on purpose. It’s simply a “good enough” attitude. That’s why nothing ever changes with respect to reliability, and most likely won’t. Even after these tests.
I don’t think the company thinks it magically happens. I think that there are enough gullible people who believe scopes should hold zero, since that is their primary function. Companies know marketing is all you need to fool most people. This is a $1400 scope for goodness sake.