Boresighting lasers have become increasingly popular tools for firearm enthusiasts and professionals alike, offering a convenient method for aligning a firearm's optical sight with its barrel. But do they truly work, and how accurate are they? This in-depth analysis explores the effectiveness of boresighting lasers, addressing common concerns and examining their practical applications.
Understanding the Principle of Boresighting Lasers
Boresight lasers operate on the principle of aligning a laser beam with the firearm's bore (the barrel's interior). By placing the laser within the barrel, typically using an adapter, the laser's emitted beam represents the trajectory of a projectile fired from the weapon. The shooter then adjusts their optical sight (scope, red dot, etc.) until the laser's point of impact matches the sight's aiming point.
How Accurate are Boresighting Lasers?
The accuracy of boresighting lasers depends on several factors, including:
- Laser Quality and Construction: High-quality lasers with precise manufacturing and stable output will yield more accurate results. Conversely, cheaper, lower-quality lasers may exhibit drift or inconsistencies.
- Proper Installation: Incorrect installation of the boresighting laser adapter can lead to significant misalignment. Meticulous attention to detail is crucial for accurate boresighting.
- Environmental Factors: Temperature fluctuations can influence the laser's trajectory, impacting accuracy. Consistent environmental conditions are ideal for optimal results.
- Firearm Condition: The firearm itself must be in good working order. A damaged barrel or loose components can significantly affect accuracy.
While boresighting lasers can offer a reasonably close alignment, it is crucial to understand that they are not a substitute for proper zeroing at the range. Boresighting should be considered a preliminary step that significantly reduces the time and ammunition needed for subsequent zeroing.
Common Misconceptions about Boresighting Laser Accuracy
Many believe boresighting lasers provide perfect alignment, eliminating the need for range time. This is inaccurate. Several factors beyond laser accuracy, such as ammunition variations, barrel harmonics, and even shooter inconsistencies, influence bullet trajectory.
Applications of Boresighting Lasers
Despite not providing perfect alignment, boresighting lasers offer several valuable applications:
- Initial Sight Alignment: They provide a quick and convenient method for roughly aligning the sight with the bore, drastically minimizing the amount of adjustment needed during range zeroing.
- Troubleshooting Sight Issues: Boresighting can assist in identifying whether sight alignment problems stem from the optical sight itself or from a misaligned barrel.
- Field Adjustments: In certain field applications where immediate sight adjustment is required and range time is limited, boresighting can provide a temporary solution until proper zeroing can be performed.
Conclusion: Do They Work? Yes, But with Caveats.
Boresighting lasers do work in providing a preliminary alignment between a firearm's barrel and its optical sight. They are a valuable tool for speeding up the zeroing process and for preliminary troubleshooting. However, it is crucial to remember that they are not a substitute for proper zeroing at a shooting range, using live ammunition. Always treat firearms safely and responsibly. Remember to always prioritize safety and proper training when handling firearms. Always consult with experienced professionals for guidance on safe firearm practices.
