I think the scope's guts will let go before the rings do
In terms of mounting level, I don't trust the short bubble levels. On a rifle with a 1913 rail, I square the ele. turret to the rail, then test for reticle cant and proper tracking.
I get your point. But you don't think there would be any practical negative impact of being that close, but not close enough for NASA's needs, to level do you?
Note that, for context, I don't dial scopes while hunting or long range shooting. I shoot off the reticles. I don't trust tracking, even though I know some scopes can do it accurately. Once I sight in 1" high at 100 yds, I let my eyes to the math at distance.
