To Zero Rifle Sights is to Calibrate Them

Calibrating a rifle’s sights to be true and zeroed at 300 meters can be determined by calibrating them to 25 meters first. When a rifle has been zeroed to 300 meters, all other ranges on the elevation knob of the sights are also zeroed. Always follow your scope manufacturer’s instructions on sighting – it contains valuable information about what could make your device unique to zero and what tools you may need to do so. Learning to zero rifle sights is essential for the ownership and operation of any scoped weapon.

  • Never operate or handle firearms without consideration of firearm safety.
  • At a range, set your target at 25 meters (or yards) and 100 meters.
  • Secure the rifle in a bipod, on sandbags, or just any other method to hold the rifle steady while you sight it. Make sure no part of the rifle is resting on a hard surface.
  • If you have a bolt-action rifle, remove the bolt and look down the bore, aligning the bore with the target.
  • If you have a single-shot rifle, open the action.
  • Note: auto-loader rifles and pumps cannot be bore sighted this way.
  • Adjust the rifle stand so that when looking through the breech end, the 100-meter target is centered in your view.
  • Without moving the rifle, adjust your scope so that the cross-hairs are aligned on the same object.
  • Your rifle is now bore-sighted to 100 meters (or yards).
Boresighter
A boresighter can help you zero your sights with precision while minimizing the expenditure of ammunition.
  • When you’re done bore sighting, sight your rifle to 25 meters, replace the bolt, and set your scope to the highest magnification that gives you a clear image.
  • Fire one round at the center of of the 25-yard target.
  • Make sure your rifle is unloaded, and look towards your target with binoculars or a spotting scope.
  • Find the shot grouping and see what you need to do when you adjust.
  • Repeat this process until your shots are hitting in the center.
  • Sight to 100 meters (or yards).
  • Make sure your barrel has cooled, get into comfortable, relaxed position, and fire 3 shots.
  • Check the shot grouping, and adjust the sight so that when aimed at the center of the bulls-eye, the bullets hit about 3 inches (7.6 cm) above center. This will give you the most effective maximum range.
Zero Rifle Sights Stabilization
The more stable you can keep your rifle during the process, the better. Devices and mounts are available and usually on-hand at most ranges today. Zeroing your sights is important and easy once you understand the basics. If you are going to zero rifle sights, do it right the first time.