Unlock Precision and Save Time: Your Guide to Effortless Firearm Zeroing with the Sightmark SM39018 Boresight

For anyone who owns a firearm chambered in the popular .38 Special or potent .357 Magnum – whether it's a trusty revolver for self-defense, a classic lever-action rifle for hunting, or a versatile pistol for target practice – achieving pinpoint accuracy is paramount. However, the traditional method of sighting in your firearm can often be a frustrating, time-consuming, and costly endeavor. It typically involves repeated trips to the shooting range, expending dozens, if not hundreds, of rounds of expensive ammunition, and making countless adjustments under pressure.

Imagine a solution that allows you to rapidly and precisely zero your sights or optics without firing a single shot. A tool that saves you significant money on ammunition, reduces your range time, and instills confidence in your firearm's setup before you even step onto the firing line. This is precisely the problem the Sightmark SM39018 Laser Boresight is designed to solve. It's an indispensable addition to any shooter's toolkit, offering an intelligent and efficient way to prepare your firearm for optimal performance.

Who Benefits Most from the Sightmark SM39018 Laser Boresight?

This powerful little device is an ideal choice for a diverse range of firearm owners and enthusiasts. Are you asking yourself, "What's the best way to sight in my new revolver scope quickly?" or "How can I check my rifle's zero without wasting ammo?" If so, this boresight is for you.

• New Firearm Owners: Learning to shoot is exciting, but the initial setup can be daunting. The SM39018 simplifies the zeroing process, allowing new shooters to understand sight alignment without the added stress and cost of live fire.
• Hunters: Before heading into the field, every hunter needs absolute confidence in their rifle's accuracy. This boresight enables quick verification of zero or initial sight-in from the comfort of your home, ensuring you're prepared for that critical shot.
• Target Shooters & Competitors: Fine-tuning your setup is crucial for competitive advantage or just improving your scores. The SM39018 helps you get on paper swiftly, allowing you to dedicate precious range time to advanced drills and refining your shooting technique.
• Reloaders: For those who meticulously craft their own ammunition, this boresight offers a consistent baseline to evaluate how different loads impact point of aim, saving components during load development.
• Firearm Enthusiasts & Collectors: Whether you're swapping optics, checking older firearms, or simply maintaining your collection, this tool provides a non-invasive way to ensure your guns are ready for action.
• Anyone Concerned About Ammunition Costs: In today's climate, ammunition prices can be prohibitive. The SM39018 is an investment that pays for itself by drastically cutting down on the rounds needed for initial zeroing.

The Undeniable Advantages of Laser Boresighting

Utilizing a laser boresight like the Sightmark SM39018 offers a multitude of benefits over traditional methods. When you ask, "How do I make my shooting more efficient?", the answer often includes this technology.

• Significant Ammunition Savings: This is perhaps the most immediate and tangible benefit. Instead of firing multiple groups to get on paper, a laser boresight allows you to make initial adjustments before firing a single live round. This translates directly to less money spent on cartridges.
• Reduced Range Time: Why spend hours at the range just to get your initial zero? With a laser boresight, you can accomplish the preliminary sight-in at home, freeing up valuable range time for actual shooting practice and skill development.
• Enhanced Precision and Consistency: A laser provides a highly visible, consistent point of reference, allowing for more precise adjustments to your iron sights, red dot, or scope. This eliminates much of the guesswork associated with traditional sighting methods.
• Ideal for "Cold Bore" Sighting: For firearms that perform differently on the first shot from a cold barrel, a laser boresight allows you to establish a starting point without heating up the barrel, maintaining true cold bore zero potential.
• Convenience and Flexibility: You don't need a dedicated shooting range to begin the zeroing process. This can be done in your garage, basement, or backyard (safely, of course, pointing at a secure backstop).
• Troubleshooting Tool: If your shots are consistently off, a boresight can help quickly diagnose whether the issue lies with your optics, mounting, or if the firearm itself requires attention.
• Great for Teaching New Shooters: It provides a clear visual aid for demonstrating sight picture and point of aim, making it easier for novices to grasp the fundamentals of accuracy.

Why the Sightmark SM39018 Stands Out: Precision Engineered for .38 Special and .357 Magnum

The market offers various boresighting solutions, but the Sightmark SM39018 Boresight is specifically engineered to meet the unique needs of .38 Special and .357 Magnum firearms, providing exceptional value and performance. When you're searching for "the best boresight for my .357 Magnum revolver," the SM39018 consistently emerges as a top recommendation.

Unmatched Accuracy and Laser Quality

At its core, the SM39018 is designed for precision. It emits a vibrant red laser with a wavelength of 632-650 nm and an output power of less than 5mW. This powerful, yet eye-safe, laser projects a crisp, bright dot that is easily visible, even in well-lit conditions. The consistent and stable laser beam ensures that your point of aim is accurately represented, allowing for precise adjustments to your optics. Its inherent accuracy typically boasts a +/- 2 MOA (Minute of Angle) tolerance, meaning that at 100 yards, the laser point will be within approximately 2 inches of the true bore axis. This level of precision is more than adequate for initial zeroing, saving you significant effort at the range.

Robust and Reliable Machined Brass Construction

Durability is a key factor for any tool meant for regular use, and the SM39018 delivers with its solid, machined brass construction. This isn't a cheap plastic imitation; it's a high-quality, robust piece of equipment built to last.

• Superior Fit: The precisely machined brass body perfectly replicates the dimensions of a .38 Special or .357 Magnum cartridge case. This ensures a snug and accurate fit within the firearm's chamber, preventing any wobble or misalignment that could compromise the laser's accuracy. A tight fit is absolutely crucial for reliable boresighting.
• Enhanced Durability: Brass is renowned for its strength and resistance to corrosion and wear. Unlike lighter materials, it won't easily deform or degrade with repeated insertion and removal from the chamber, providing consistent performance over its lifespan.
• Optimal Heat Dissipation: While not a major factor for a boresight, brass does handle minor temperature fluctuations better than some plastics, contributing to the stability of the internal laser module.
• Premium Feel: The weight and feel of the brass contribute to the overall impression of a quality, professional-grade tool.

Effortless Operation: Simplicity for Every Shooter

One of the hallmarks of a truly useful tool is its ease of use. The Sightmark SM39018 is remarkably simple to operate, even for those new to boresighting. It's a plug-and-play solution:

1. Insert Batteries: The unit comes with a battery pack, typically multiple AG3 or LR41 button-cell batteries, ensuring you have power right out of the box. Installation is straightforward.
2. Chamber the Boresight: Safely insert the boresight into the chamber of your unloaded .38 Special or .357 Magnum firearm, just as you would a live round. The laser will immediately activate, projecting a bright red dot down the barrel.
3. Align Sights/Optics: Position your firearm securely (a gun vice or sandbags are recommended) and aim at a target about 15-25 yards away. Adjust your scope's windage and elevation, or your iron sights, until they perfectly align with the laser dot. This sets your preliminary zero.
4. Remove and Fire: Once aligned, safely remove the boresight from the chamber. Your firearm is now ready for fine-tuning at the range with live ammunition, requiring significantly fewer rounds to achieve a perfect zero.

Complete Kit: Battery Pack & Carrying Case Included

The value of the Sightmark SM39018 is further enhanced by its comprehensive package. It doesn't just come with the boresight; it includes a dedicated battery pack (typically multiple sets of LR41/AG3 batteries) and a durable, compact carrying case. This means:

• Immediate Use: No need to hunt for compatible batteries; you can start boresighting right away.
• Longevity: Having spare batteries ensures your boresight is always ready when you need it.
• Protection and Portability: The included carrying case protects your investment from dust, moisture, and impact. It also makes it incredibly easy to transport the boresight to the range, a friend's house, or simply keep it organized in your gear bag.

Maximizing Your Shooting Experience with the Sightmark SM39018

Incorporating the Sightmark SM39018 into your routine isn't just about saving money; it's about elevating your entire shooting experience.

• Dry Fire Practice Enhancement: For safe dry fire practice at home, chambering the boresight allows you to see precisely where your "shot" would land. This visual feedback is invaluable for diagnosing trigger pull issues, minimizing muzzle movement, and perfecting your sight alignment and follow-through. It's a powerful tool for improving fundamentals without consuming any ammunition.
• Rapid Sight Verification: If you bump your rifle, travel with it, or suspect your zero might be off, a quick check with the SM39018 can confirm your sights are still aligned, giving you peace of mind before a hunt or competition.
• New Optic Installation: When mounting a new scope or red dot sight on your .38 Special or .357 Magnum firearm, the boresight allows you to get your initial zero remarkably close to perfect. This eliminates the frustration of being "off paper" at the range.
• Lever-Action Rifle Compatibility: While often associated with revolvers, the .357 Magnum and .38 Special are also popular calibers for lever-action rifles. The SM39018 is just as effective for these classic firearms, providing a precise and easy way to zero their sights or optics.

Common Questions About Laser Boresighting Answered

Many shooters have questions about the best practices for using a laser boresight. Here are some frequently asked questions and their expert answers:

"Is a laser boresight accurate enough for my needs?"

For initial zeroing and getting your shots "on paper" at 15-25 yards, a quality laser boresight like the Sightmark SM39018 is exceptionally accurate. While it won't replace final live-fire confirmation and fine-tuning at your intended shooting distance, it drastically reduces the number of rounds needed to reach that point. Most shooters find it gets them within an inch or two of perfect zero at 25 yards, requiring only minor adjustments with live fire.

"How far away should I place my target for boresighting?"

For most laser boresights, a distance of 15 to 25 yards (or meters) is ideal. This range is far enough to provide a clear indication of your bore's alignment relative to your sights, but close enough for the laser dot to remain clear and visible. Attempting to boresight at very short distances (e.g., 5 yards) can exaggerate parallax errors, while very long distances can make the laser dot difficult to discern, especially in bright conditions.

"Can I use this boresight for other calibers?"

No, the Sightmark SM39018 is specifically designed and machined to fit the chambers of firearms chambered in .38 Special and .357 Magnum. It will not work for other calibers. Using the correct caliber-specific boresight is critical for accuracy and proper function.

"How do I ensure the boresight is properly seated in the chamber?"

To ensure accuracy, gently but firmly seat the brass boresight into the firearm's chamber. Ensure the firearm is completely unloaded and pointed in a safe direction. For revolvers, insert it into a cylinder chamber. For rifles, chamber it like a regular round. The snug fit of the precisely machined brass body of the Sightmark SM39018 helps ensure it seats correctly every time.

"Do I need to clean my barrel before boresighting?"

It's always a good practice to boresight with a clean barrel, especially if you're establishing a new zero. Fouling in the barrel can slightly affect the laser's projection, though for initial zeroing, this effect is usually negligible. A clean barrel provides the most consistent baseline.

"Is a laser boresight better than a bore-mounted arbor?"

For chambered firearms, a chamber-style boresight like the SM39018 often offers superior accuracy and consistency compared to muzzle-mounted arbors. The chambered design ensures the laser is perfectly aligned with the bore's axis from the point of ignition, whereas muzzle-mounted arbors can sometimes be affected by crown wear or slight variations in muzzle diameter. The brass construction further enhances this precision.

The Sightmark SM39018 is more than just a tool; it's an investment in your shooting proficiency, saving you money, time, and frustration. It empowers you to achieve a precise zero quickly and confidently, allowing you to focus on what truly matters: improving your shooting skills and enjoying your time at the range or in the field. This dependable and effective boresight is an essential piece of gear for any serious owner of a .38 Special or .357 Magnum firearm.

Sightmark SM39018 Laser Boresight: Technical Specifications

Feature	Detail
Product Model	Sightmark SM39018
Laser Type	Red Laser Boresight
Caliber Compatibility	.38 Special, .357 Magnum
Laser Wavelength	632-650 nm
Laser Output	<5mW
Construction Material	Machined Brass
Accuracy	+/- 2 MOA (Minute of Angle)
Battery Type	AG3 / LR41 (Multiple included in battery pack)
Included Accessories	Battery Pack, Carrying Case
UPC	810119011244

You can find the Sightmark SM39018 Boresight, along with a wide array of other shooting accessories and firearms, available at DEGuns, your trusted source for quality outdoor and shooting sports equipment. Visit deguns.com to learn more and make this essential tool part of your shooting kit.