Mike...I am really surprised at your comments. Does it not say that this is an abstract? From my recollection, correct me if I'm wrong [and I'm sure you will if I'm wrong] an abstract is an overview of a study highlighting the conclusion. BTW, I've read the entire study outside of GIPSA.
If interested I can tell you how to zero a scope using just one shot.
Respponse...The problem with the abstract is that it failed to mention their research was to only isolate negative impacts if any. so the abstract itself was misleading and did not disclose the true nature of their research.
Zeroing...Fire one shot and then adjust the scope to the inended point could zero with one shot. Have a great day.