I really appreciate the effort put into this article, however as someone who is not a math guy and dyslexic it is not of a lot of use to me. Having said that, it is this kind of math and physics that is applied by others to develop things people like me can (and do) use! correct me if I'm wrong (and I'm sure people will) but if you boil all this down to its simplest form, this is the result: make sure that your scope is mounted level on your rifle (Wheeler scope kit levels) and then make sure that your rifle is level when you pull the trigger! Simple right? Well no and I think that is the point of the article. I have tried bubble levels on my scope (not bad) BUT... the best thing for me is a LED level made by MDT (MV3 Send-It). I can literally have one eye on target and the other sees the LED's on my device. Reticle on target + green LED = 1/4 MOA groups. But again, this article is the reasoning behind the technology