And since you mentioned the Mark 5, here’s how the one my buddy has did on evaluation.
Gunsmith says it’s the most perfect scope he’s seen since my Mark 4 M5A2
In fairness, that report simply shows that the turret adjustment increments are as advertised and that the PA and magnification don't alter POI, but says nothing about the zero retention or repeatability of the scope.
If I'm interpreting it correctly, the last line seems to say that the scope tracks straight and that the reticle isn't canted, though I could be wrong about that. If I'm correct, that's a good start. It is nice to see that reported properties are as hoped for when a guy buys a scope.