What is a .308 Bore Sight Laser?
How it Works
The operation of a .308 bore sight laser is remarkably straightforward. The user starts by ensuring the firearm is completely unloaded and safe. Then, depending on the type of bore sight, it’s either inserted into the chamber like a cartridge or fitted to the barrel (with arbor types). The laser is then activated, projecting a clear beam towards the target. Next, you look through your scope, identify where the laser dot appears on the target, and adjust the scope’s windage and elevation turrets until the reticle (the crosshairs or other aiming point within the scope) aligns directly with the laser dot. Once this alignment is achieved, you have a solid starting point, and can then proceed with live-fire adjustments for absolute precision.
Benefits of Using this Tool
The advantages of using a .308 bore sight laser over traditional bore sighting methods are numerous and compelling.
Firstly, time is saved. Aligning your scope manually with the naked eye, or by relying on only live-fire adjustments can be a time-consuming process, requiring many rounds of ammunition and considerable patience. A .308 bore sight laser drastically reduces the time spent on initial sight alignment. The process is often completed in mere minutes, allowing you to focus on other important tasks.
Secondly, ammunition savings are a significant advantage. Each shot fired during the sight-in process represents a cost. By using a .308 bore sight laser, you minimize the number of rounds required to zero your rifle. You can achieve near-perfect alignment before firing a single shot, reducing the waste. This becomes especially crucial when using expensive ammunition or if you regularly zero multiple rifles.
Thirdly, consider the convenience factor, especially in field conditions. Imagine arriving at a hunting location and realizing your scope is slightly off. Carrying a .308 bore sight laser in your gear bag allows you to make the necessary adjustments quickly and without having to trek back to a range. This is particularly useful when you need to re-zero your rifle after a long travel, or if you happen to bump your scope during a hunt.
Choosing the Right Type of this Device
Chamber-Mounted Lasers
Chamber-mounted lasers are designed to fit directly into the chamber of your .308 rifle, just like a cartridge. These are generally the simplest to use, offering quick insertion and removal.
Arbor/Mandrel-Type Lasers
Arbor lasers, also known as mandrel or muzzle-mounted lasers, feature a laser unit that is attached to a cylindrical arbor or a series of arbors. These arbors are designed to fit snugly within the bore of your rifle.
The advantages of an arbor laser include the ability to fit a wider range of calibers, since they’re not chamber specific. However, it’s very important that the arbor fits snugly without being too tight, which may cause damage to the bore, or too loose, which might cause the laser to be inaccurate.
Key Features to Keep in Mind
Accuracy
Accuracy should be your top priority. The laser beam must be precisely calibrated to ensure consistent alignment. Look for lasers that claim tight tolerances and are manufactured to high standards. A slightly off-center beam will result in inaccurate scope adjustments.
Durability
Durability is paramount, especially if you intend to use the laser frequently or in challenging conditions. Choose a device made from sturdy materials that can withstand impacts and rough handling.
Visibility
Visibility is another essential feature. The laser beam must be bright and easily visible, even in bright sunlight or at longer distances. Some lasers feature adjustable brightness settings. A bright laser beam makes the alignment process much easier.
Battery Life
Battery Life will impact convenience. Ensure the device has an adequate battery life to cover your needs. Most lasers use common battery types.
Compatibility
Compatibility is also important. Always purchase a .308 bore sight laser specifically designed for your caliber. Trying to use an incompatible device will lead to inaccurate results and may even damage your firearm.
Ease of Use
Ease of Use is always a win. Consider a design that is straightforward to install and operate. The simpler the design, the less time you’ll spend on setup and the quicker you can get to the range.
Budget
Budget is a factor. Prices range from affordable to more expensive models. It’s worth investing in a high-quality laser, but don’t overspend on features you won’t use.
The Process: Steps to Success
Preparation
Prepare your rifle by making certain that it is completely unloaded and safe. Double-check that the chamber is empty and the magazine is removed. Follow all safe gun handling practices at all times.
Installing the Bore Sight Laser
Installing the Bore Sight Laser varies depending on the type you have. For chamber-mounted lasers, simply insert the device into the chamber, much like a cartridge. Arbor lasers will need to be carefully positioned and secured in the bore. Follow the manufacturer’s instructions.
Aligning the Scope or Optic
Aligning the Scope or Optic is the next important step. Secure your rifle firmly in a stable shooting rest. Look through your scope and locate the laser dot on your target (typically at a distance of 25-50 yards). Adjust the windage and elevation turrets on your scope until the reticle (the crosshairs or aiming point) is aligned directly with the laser dot.
Confirming Zero at the Range
Confirming Zero at the Range is the final step, and the only way to assure a truly accurate result. Fire a three-shot group at your target. Observe the point of impact, and make any final adjustments to your scope’s turrets. This live-fire confirmation ensures your zero is precise for your chosen ammunition.
Common Pitfalls to Avoid
Safety
Always ensure that your firearm is unloaded before handling it or using a .308 bore sight laser. This seems obvious, but it is essential for safety.
Sunlight
Avoid using the laser in direct, bright sunlight, which can make the beam difficult to see. If you’re bore sighting outdoors, try to find a shaded location.
Over-Adjustment
Avoid over-adjusting your scope. Make small, precise adjustments, observing the impact of each adjustment.
Reliance on the Laser
Do not rely solely on the bore sight laser. Always confirm your zero with live-fire practice.
Wrong Caliber
Make sure you’re using a .308-specific device. Other calibers will not give you a good alignment.
Care and Storage
Cleaning
The laser unit should be kept clean. Wipe the lens with a soft cloth to remove any dust or debris. Avoid using harsh chemicals or abrasive materials.
Battery Replacement
Follow the manufacturer’s instructions for battery replacement. Use only the recommended battery type.
Storage
Store your .308 bore sight laser in a cool, dry place, away from direct sunlight, extreme temperatures, and humidity.
