Boresighting a rifle with a laser is a practical way to align your rifle’s sights or scope roughly with the barrel before live-firing at the range. This process saves time, ammunition, and frustration by ensuring your first shots are close to the target, making fine zeroing adjustments easier and more efficient. Laser boresighters project a visible beam down the barrel’s axis, allowing you to adjust your optics to match without firing a single round.
What You’ll Need
- A rifle with a removable bolt or accessible chamber
- A laser boresighter compatible with your rifle’s caliber or bore diameter
- A stable shooting rest or bench to hold your rifle steady
- A target placed at a known distance (commonly 25 yards or meters)
- A quality scope or iron sights mounted on the rifle
- Tools for adjusting your sights or scope (usually an Allen wrench or screwdriver)
- Safety equipment (ear and eye protection, even though no live firing is done yet)
Step-by-Step
- Ensure Safety First: Confirm your rifle is unloaded. Remove the magazine and double-check the chamber is empty. Treat every firearm as if it is loaded until verified.
- Remove the Bolt or Open the Action: Depending on your rifle model, remove the bolt to gain a clear line of sight down the barrel. Some lever-action or break-action rifles allow you to open the action to insert the laser boresighter directly into the chamber.
- Insert the Laser Boresighter: Place the laser boresighter into the chamber or bore. For cartridge-shaped boresighters, insert it like a round. For barrel-insert models, slide it gently into the bore. Make sure it fits snugly and is centered.
- Stabilize the Rifle: Mount your rifle securely on a shooting rest or sandbags to prevent movement during alignment. A steady platform is essential for accurate boresighting.
- Turn On the Laser: Activate the laser boresighter. It will project a red or green dot onto your target downrange. Ensure the laser dot is visible and steady.
- Position Your Target: Place a target at a practical distance, typically 25 yards or meters. This distance balances accuracy with convenience for initial sighting.
- Align Your Optics or Sights: Look through your scope or iron sights and adjust the windage (left/right) and elevation (up/down) turrets or screws. Move the reticle until it centers precisely on the laser dot projected on the target.
- Double-Check Alignment: After initial adjustments, confirm the reticle stays centered on the laser dot when you slightly shift your eye position. This ensures proper parallax and alignment.
- Remove the Laser Boresighter: Turn off the laser and carefully remove the boresighter from the barrel or chamber.
- Replace the Bolt or Close the Action: Reassemble your rifle fully and ensure it is safe and ready for live-fire zeroing.
- Confirm Zero at the Range: Fire a group of test shots at your zeroing distance to make final precise adjustments. The laser boresighter gets you close, but live firing is necessary for exact zero.
Common Mistakes
- Not confirming the rifle is unloaded: Skipping this critical safety step can lead to dangerous accidents.
- Using the wrong size or type of laser boresighter: Ill-fitting devices can cause inaccurate alignment or damage to the barrel.
- Failing to stabilize the rifle: Holding the rifle by hand or on an unstable surface causes inconsistent aim points.
- Adjusting sights without a clear laser dot: Poor visibility or ambient light interference can mislead your adjustments.
- Expecting perfect zero from boresighting alone: Laser boresighting is an initial alignment tool, not a substitute for live-fire zeroing.
- Ignoring parallax and eye position: Not verifying that the reticle stays on the laser dot when moving your eye can cause errors in sight picture.
Tips
- Choose the right laser color: Green lasers are usually easier to see in daylight compared to red lasers, especially outdoors.
- Use a high-contrast target: Bright, bold targets with clear center marks help you see the laser dot distinctly.
- Set your scope’s parallax adjustment to the target distance: This ensures your reticle doesn’t shift when your eye moves.
- Mark your initial adjustments: Record turret clicks or settings so you can return to baseline if needed.
- Practice proper rifle handling: Even during boresighting, maintain consistent cheek weld and sight picture to simulate real shooting conditions.
- Check battery life of your laser boresighter: Weak batteries can cause flickering or dim dots, affecting accuracy.
- Use a tripod or stable bench rest: The steadier your rifle, the more precise your alignment.
Troubleshooting
The laser dot is not visible on the target: Check if the laser is turned on and batteries are fresh. Ensure the boresighter is properly seated in the chamber or bore. Try adjusting ambient lighting or move the target closer for better visibility.
The laser dot appears off-center or inconsistent: Confirm the boresighter fits snugly and is not wobbling. Clean the barrel and chamber to remove any obstructions. Re-seat the boresighter carefully.
Scope adjustments do not move the reticle to the laser dot: Verify you are turning the correct windage and elevation turrets and that the scope is functioning properly. Some scopes have locking turrets that must be unlocked before adjustment.
After live firing, shots are still far from the point of aim: Remember that laser boresighting only gets you close. Environmental factors, bullet drop, and rifle-specific variables require fine zeroing with live rounds. Double-check your initial boresighting steps and repeat if needed.
The laser boresighter won’t fit in your rifle: Confirm you have the correct caliber and bore diameter boresighter. If none is available, consider a universal laser boresighter that fits the barrel externally or consult a professional gunsmith.
Frequently Asked Questions
Q: Can I use laser boresighting for all types of rifles?
A: Most centerfire rifles with removable bolts can be laser boresighted. Some rimfire rifles or those without a removable bolt may require alternative methods.
Q: How accurate is laser boresighting compared to live-fire zeroing?
A: Laser boresighting provides a close alignment, typically within a few inches at 25 yards, but live-fire zeroing is essential for precise accuracy.
Q: Can laser boresighting replace range zeroing?
A: No, it only reduces the time and rounds needed at the range by getting you on paper quickly. Final adjustments require live shooting.
Q: Is laser boresighting safe?
A: Yes, as long as you follow all firearm safety protocols, confirm the rifle is unloaded, and handle the laser device properly.
Q: What distance should I place my target for boresighting?
A: A common distance is 25 yards or meters, but you can use longer distances if space allows. The key is to be consistent with your distance for easier final zeroing.
Q: Do I need a special scope for laser boresighting?
A: No special scope is required, but scopes with clear, easy-to-adjust turrets and parallax adjustment help improve the process.
By following these steps and tips, laser boresighting your rifle becomes a straightforward and efficient way to start your zeroing process. It saves ammunition and time, making your shooting experience smoother and more enjoyable. Always prioritize safety and take your time during each step to ensure the best results.
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