In this article, I will cover 3 ways to test how accurately your scope is tracking. I will also provide some ways to work with a scope that is not tracking 100% correctly.
https://www.thefirearmblog.com/blog/2019/12/03/know-your-scope-to-know-your-d-o-p-e/
https://www.thefirearmblog.com/blog/2019/12/03/know-your-scope-to-know-your-d-o-p-e/