Hi BBob, both the topics of levels and cant are heavily debated.As long as you are setting up your scope to track properly with the particular level you are using why would it matter at all if that level was slightly different than another level? If the level is out slightly in reference to the guns true vertical but is correct with the scope at what point is that tiny bit of cant going to be an issue? If purposely setup my rifle with some cant but the level and the scope are in alignment (tracking properly) at what point will that cant cause me issues?
Here's a recent Rokslide thread about this: https://rokslide.com/forums/threads...ght-increases-cant-error-and-how-much.342253/
Snipers Hide also has a long one that gets into the calculations.
I think part of the issue with the debates is that they intermingle ballistics with reliability (or lack of) of the levels themselves, with debates about whether humans can tell cant inherently or not ... for the debates to make sense / do justice, I think all three areas need to be considered together.