Barnett Crossbow Scopes and Yardage Lines

A crossbow reticle is not a rifle crosshair with clutter added. The top crosshair is your zero, and each line below is a holdover for a longer distance where the bolt has dropped further.

On a typical Barnett 4x32, the lines correspond to 20, 30, 40 and 50 yards with the top crosshair at 20. That spacing is calculated for a specific speed. On a bow shooting slower than the calibration speed, every line hits short of its labelled distance; on a faster bow, long.

This is why two people with identical scopes get different results and each assumes the other is doing something wrong. The reticle is a model, and the model has inputs - your bow's actual speed and your bolt's actual weight.

Use a proper backstop and the bolts you actually intend to hunt with.

1. Start at 20 yards using only the top crosshair. Ignore every other line until that one is dead on.
2. Adjust in the direction the bolt needs to go. Crossbow turrets move the point of impact - hitting low means dialling up.
3. Shoot groups of three. A single bolt tells you nothing about whether it was the bow or you.
4. Then check the lower lines. Shoot 30, 40 and 50 using the matching line and note where each actually lands.
5. Write down the real distances. If the second line actually prints at 33 yards, 33 is now your number. Tape the list to the stock.

Step five is the one everyone skips and the one that makes the scope useful in the field.

One Barnett-specific note: if you have switched between Headhunter and a third-party bolt, or between 20 and 22 inch, re-sight completely. The weight change moves everything.

Better crossbow scopes solve the calibration problem directly with a speed adjustment - a ring on the magnification collar set to your bow's measured speed, which shifts the effective spacing of the holdover lines. Set it correctly and the labelled distances become genuinely accurate instead of approximate.

If you are upgrading from a bundled 4x32, this is the feature worth paying for, ahead of glass quality or magnification. A variable 1.5-5x32 with a speed ring covers close treestand work at the bottom end and longer open shots at the top, and removes the guesswork the fixed 4x32 leaves you with.

Red and green illuminated reticles earn their keep in low light, which is when most hunting shots happen. Two practical points:

• Carry spares. Illumination dies at the worst moment and usually runs on a coin cell you do not have a spare of at home.
• Cold kills coin cells. A battery that tested fine indoors can be flat after a few hours at freezing. Replace at the start of the season rather than when it fails.

Also check the etched reticle is visible with illumination off. If it is too fine to see against a dark animal without the light, the scope is the wrong choice for low-light hunting no matter how good the illumination is.

Barnett crossbows use a Picatinny or Weaver rail and bundled scopes come with matching rings. Fitting an aftermarket scope, check ring height: too low and the objective bell fouls the rail, too high and you lose a repeatable cheek weld - which reintroduces exactly the inconsistency the scope exists to remove.

Torque ring screws evenly in stages rather than fully tightening one at a time, and re-check them after the first twenty shots. Crossbow recoil is a sharp impulse and works screws loose. A bow that will not hold zero is usually a scope moving in its rings, not a bow problem - check the screws before you start adjusting anything else.