The Proper Way to Use Your Scope
Scope sights fluster some shooters who don't know how to take full advantage of them. But a scope, used properly, can wring every inch of potential out of any rifle and any shooter.
A scope helps hunters fire quickly and accurately because they make targets easier to see. Equally important, they place the aiming point (reticle or crosshairs) in the same plane of focus as the target. Open sights make you choose your focus point either the rear sight, front sight or target. It's impossible to keep all three sharp. Not so a scope. Everything's sharp, wonderfully bright and large. What could be better?
But none of this happens if you don't know how to set up a scope and use it properly. First, adjust the eye-piece diopter. This is either the outermost ring around the eyepiece (the end you look into) or the bell itself. You twist this in or out until the reticle looks its sharpest to your eye. That's a one-time deal unless your vision changes.
With the reticle sharp, the image should be sharp at 100- to 200 yards for most scopes because the manufacturer pre-focuses them at about 150 yards. Shotgun scopes are usually factory-focused at 75 yards. With powers under about 6X, you'll hardly notice the focus differences because your eyes make up for them, but at higher magnifications, you'll see that objects inside of 100 yards are looking pretty fuzzy. To fix this, turn down the magnification. This increases depth-of-focus. If you have a Parallax Adjustment dial on your scope (this is essentially a focusing wheel,) you can turn it much like a camera lens to focus precisely at various distances. Turn it until the target looks sharp.