As an outdoor writer and avid hunter with over a decade of experience, I’ve learned that consistent accuracy is paramount, whether you’re preparing for a big game hunt, participating in competitive shooting, or simply ensuring your firearm is ready for self-defense. A crucial step in achieving that accuracy is properly zeroing your firearm. And that’s where understanding how to use a boresight comes in. A boresight allows you to initially align your scope or sights with the barrel before you even fire a shot, saving you time, ammunition, and frustration at the range. This guide will walk you through everything you need to know about boresighting, from choosing the right tool to executing the process safely and effectively.
Simply put, a boresight is a tool used to mechanically align your firearm’s sights (or scope) with the barrel. It doesn’t rely on live ammunition, making it a safe and efficient way to get a preliminary zero. Think of it as a starting point for fine-tuning your accuracy. Without a boresight, you’re essentially guessing where your shots will land, and then making adjustments based on those guesses. This can be a lengthy and expensive process.
Here’s why using a boresight is beneficial:
There are several types of boresights available, each with its own advantages and disadvantages. Understanding these differences will help you choose the best option for your needs.
Optical boresights, often resembling a small telescope, are inserted into the firearm’s barrel. You then look through the boresight and align its reticle with a target at a specific distance (usually 25 or 100 yards). These are generally considered more accurate than laser boresights, especially for longer ranges. They are also relatively inexpensive. However, they require sufficient light to see the reticle clearly. REI Expert Advice provides a good overview of optical boresight use.
Laser boresights project a visible laser beam down the barrel, indicating the approximate center of the bullet’s trajectory. They are easy to use, work well in low-light conditions, and are compatible with a wide range of firearms. However, laser boresights can be less accurate than optical boresights, particularly at longer distances, and can be affected by barrel obstructions. They also require batteries. You can find more information on laser boresights from manufacturers like Boreser.
These are the simplest and least expensive type of boresight. They consist of a magnetized rod that aligns with the barrel. While easy to use, magnetic boresights are the least accurate and are best suited for rough alignment before using a more precise method. They are primarily useful for rimfire rifles.
Let's focus on how to use a boresight with an optical or laser system, as these are the most common. Always consult your firearm’s manual and the boresight’s instructions before beginning.
While the general process remains the same, there are some nuances to consider when boresighting different types of firearms.
Rifles generally benefit the most from boresighting, especially those with higher-powered scopes. A 100-yard zero is common for many hunting rifles. Ensure your rest is stable and level.
Boresighting handguns can be more challenging due to their shorter sight radius. A 25-yard zero is often sufficient. Pay close attention to your grip and trigger pull when confirming your zero at the range.
Boresighting shotguns is typically done for slug barrels. Use a slug-specific boresight and follow the same principles as with rifles.
Sometimes, things don’t go as planned. Here are some common issues and how to address them:
Proper maintenance will extend the life of your boresight and ensure its accuracy.
As responsible firearm owners, we must also be mindful of our impact on the environment. Always practice safe shooting habits and adhere to the principles of Leave No Trace. Be aware of local regulations regarding shooting on public lands, as outlined by the USDA Forest Service and the National Park Service. Respect wildlife and private property.
Learning how to use a boresight is a valuable skill for any firearm enthusiast. By following these guidelines, you can improve your accuracy, save time and money, and enjoy a more rewarding shooting experience. Remember, safety is always the top priority.