Boresighting a scope is a crucial first step in the process of zeroing your rifle. It significantly reduces the time and ammunition needed to achieve a precise zero at the range. This process aligns your scope's crosshairs with the bore of your rifle, providing a close approximation of where your bullets will impact. While it doesn't replace proper range zeroing, boresighting gives you a head start, saving you frustration and potentially expensive ammunition.
What is Boresighting?
Boresighting involves using a boresighting tool to align the scope's reticle with the barrel's line of fire. This tool, typically a small device inserted into the barrel's muzzle, projects a laser or a visible aiming point. By adjusting the scope's turrets to center this projected point in your reticle, you're effectively establishing a close approximation of your point of impact.
Why Boresight Your Scope?
There are several compelling reasons to boresight your scope before heading to the range:
- Save Ammunition: By getting your scope close to zero before firing, you significantly reduce the number of rounds required to achieve an accurate zero. This is especially important with expensive ammunition.
- Save Time: Precise zeroing can be a time-consuming process. Boresighting cuts down on this time considerably.
- Improve Accuracy: Starting with a close approximation minimizes the adjustments needed at the range, leading to a more precise final zero.
- Protect Your Equipment: Reducing the number of shots fired helps to extend the lifespan of your rifle barrel.
Methods for Boresighting a Scope
Several methods exist for boresighting a scope, each with its pros and cons:
1. Using a Boresighting Tool:
This is the most common and generally recommended method. Boresighting tools are readily available online and at sporting goods stores. They're relatively inexpensive and easy to use, providing a precise alignment.
Steps:
- Safe Gun Handling: Always follow safe gun handling practices. Ensure the firearm is unloaded and the action is open.
- Insert the Boresight: Carefully insert the boresighting tool into the barrel's muzzle.
- Mount the Rifle: Securely mount the rifle in a stable rest (vise, sandbag, etc.).
- Adjust the Scope: Look through the scope and adjust the elevation and windage turrets until the boresight's laser or aiming point is centered in your reticle.
2. Using a Laser Bore Sighter (Less Common):
Some shooters use laser boresighters. These project a laser beam through the barrel, giving you a clear visual. However, these can be more expensive than traditional boresighters and require careful alignment to ensure accuracy.
3. Improvised Methods (Not Recommended):
While some improvised methods exist, they are generally unreliable and not recommended for accurate boresighting. Using these methods can lead to a poor initial zero and waste ammunition.
After Boresighting: Range Zeroing
Remember that boresighting is only the first step. It's crucial to follow up with proper range zeroing to fine-tune your scope's adjustments and ensure an accurate point of impact at various distances. This involves firing groups of shots at different ranges and adjusting the scope turrets based on the point of impact.
Conclusion
Boresighting your scope is a valuable technique that can save you time, ammunition, and frustration. By using a boresighting tool and following the steps outlined above, you can significantly improve the efficiency and accuracy of your zeroing process. Always remember to prioritize safety and to follow up boresighting with proper range zeroing to achieve the most accurate and effective results.
