The point is to shoot at a big enough piece of paper to see your entire pattern....I shoot at the center of a blank piece of 4'x4' paper with whichever combo (shell&choke) I'm testing ,then I draw a 10" circle around the densest portion of the pattern,then adjust my sights accordingly. More times than not adjustable sights have to be added....I myself use a Burris Fast Fire 3 so this is how I compensate for windage and elevation. This is just a "in a nutshell" description of why we pattern like we do. Whatever the case,make ABSOLUTELY sure you shoot at a piece of paper big enough to show your entire pattern. Too many times folks shoot at notebook sized targets and think their shell/choke combo is not good,when in fact it may be a great pattern they just can't see it because it's simply not on the target. Hope this helped,feel free to reach out anytime!!!!!