OL's Protocal Explained
We began by reading each manual and following basic directions for charging and setting up the predator calls. We operated each of them with an eye to quality of construction, an ear to sound quality and volume, and a feel for ergonomics and ease of use. Controls and sounds were tested at 50, 100, 150, and 200 yards. Two testers relied on more than 40 years of calling experience in making subjective judgements on volume and sound quality.