Today’s video showcase covers bore-sighting methods and technology. Bore-sighting the old-fashioned way — by looking down the bore of a rifle at a target — is not difficult. With a conventional bolt-action rifle, visual bore-sighting can be done quickly and easily. Rest your gun securely on bags, remove your bolt and set up a 50-yard target with a large bright orange or black center circle. Look through the back of the action and you should be able to sight down the bore with your own eyes just fine. There’s no need for expensive hardware. In fact it may be easier to bore-sight the “old-fashioned way” rather than try to see a laser in bright sunlight at 50 yards (or even 25).

However, with lever guns and semi-auto rifles, including the popular AR15, M1 Garand, and M1A, the design of the receiver may make it virtually impossible to sight down the bore with the naked eye. That’s where a modern laser bore-sighting device comes in handy. For those situations where a bore-sighting tool is needed, we recommend a laser bore-sighter that fits inside your chamber. An in-chamber laser device, as shown below, is handy and has less safety risk than a tool which fits in the end of the barrel.

How to Bore-Sight Your Rifle in Five Minutes

This video from Australia shows the basics of the bore-sighting process. First set up a target 50 yards (or closer) from your shooting station. Make sure the rifle is well-supported and stable. When the target is ideally centered in the BORE of the barrel, then adjust the reticle on your scope to center the crosshairs on the middle of the target. Then, after checking down-range, take a few test shots. Finally, move the target out to 100 yards and confirm your zero, as explained at the close of today’s article.

Vortex Shows How to Bore-Sight Rifles

This well-made, informative video from Vortex covers the basics of bore-sighting. Bore sighting your rifle is a simple way to establish an initial zero to get you on target faster and save you ammo at the range. Thankfully, it doesn’t take a ton of gear or ammunition to bore-sight a rifle effectively. Video host Jimmy from Vortex provides a handy, step-by-step guide in this 10-minute video.

Bore-Sighting Using a Barrel-Mounted Laser Bore-Sighter

If you wondered why a barrel-mounted laser bore-sighter was off-center? Or if you want to learn how to use one properly, this video shows how to safely and properly zero a scope using a barrel-mounted laser bore sight device. Another option is a small cartridge-sized laser that fits inside the chamber. These sell for under $25.00 and are convenient. There are safety advantages to in-chamber lasers.

Initial Bore-Sighting at Home (Before You Head to the Range)

This useful video shows how to bore-sight a rifle at home. This can save time (and money for ammo) when you do get to the range to confirm your scope’s zero. This home procedure works best if the target is well-illuminated while the rifle is in a shadowed area, creating the best contrast. Also make sure the rifle is on a steady support — such as a portable gun vise or sandbags front and rear.

Bore-Sighting with a Red Dot (Reflex) Sight

As with conventional scopes, if you have a red dot sight or reflex optic, you’ll need to bore-sight your rifle, then zero the optic. [Reflex sights use a reflex lens to project a dot or reticle onto the target, whereas red dot sights use a flat, reflective surface to display a red dot reticle.] In this video, retired Navy SEAL Mark Cochiolo demonstrates how to bore-sight then adjust a red dot. Bore sighting allows you to zero your red dot so that your shots hit near your intended point of impact.

Learn More about Bore-Sighting with Tools

To learn more about bore-sighting, you can view a detailed article on the Warne Scope Mounts website. This features through-the-barrel images and discussion of tools that fit in the chamber or barrel to project a laser beam down-range. Shown below are cartridge-sized projecting lasers that fit in a rifle’s chamber. These are available for a wide variety of cartridge/chamber sizes.

WARNING: If you use an in-barrel laser be sure to remove it BEFORE chambering a round. ANY obstruction in the barrel can cause serious injury or even death if you fire a round.

Bore Sight Grid Tool with Arbors
The Bushnell Bore Sight with Arbors is a bore-sighting tool that many gun stores and gunsmiths use. This device uses arbors but does not transmit a laser.

You attach the tool to the end of the barrel and align it with your scope. A grid is visible inside the bore-sighter. Look at that grid and then and align your scope’s reticle with the grid. This Bushnell unit ships with three expandable arbors in 22-270 caliber, 7mm-35 caliber, and 35-45 caliber.

How to Zero a Hunting Rifle Efficiently

Once you have bore-sighted your rifle to get “on target” successfully, then you want to zero your optic so that the shot falls exactly where you want it at your target distance, typically 100 yards. This Vortex video shows you how to quickly and efficiently sight-in and zero a hunting rifle before heading out into the field. This video explains a simple procedure that lets you get a solid zero in just three shots. Of course you probably want to fire a few more rounds to confirm your zero before you head off to your hunting grounds, but this will let you get on-target with a minimum amount of time and ammo expended. This helpful video now has 3.2 million views on YouTube!

Fouling Shots and Cold Bore Condition
If you recently cleaned your rifle, you may want to fire two or three fouling shots before you start this procedure. But keep in mind that you want to duplicate the typical cold bore conditions that you’ll experience during the hunt. If you set your zero after three fouling shots, then make sure the bore is in a similar condition when you actually go out hunting.

Laser boresighters are very handy getting a new rifle or pistol on paper for the first time. A good, in-chamber boresighting unit can definitely save you time and money. You’ll definitely waste fewer rounds if you start with a boresighter which uses a laser to shine a bright red dot on the target.

And right now, on Amazon, you can get Laser Boresighters starting at the super-low price of $8.99 for the .223 Rem cartridge. Other sizes are $9.99 and up. The .270 Win/.30-06 Boresighter is $10.99, while the handy .223 Rem twin pack with two boresighters is $13.99. Buy the pair and give one to a buddy.

SPECIFICATIONS: Output Power: <5 mW; Laser Class/Wavelength: IIIA, 632 to 650 nm; Battery Type: AG3/LR41; Dot Size: 2" Diameter at 100 yards; Sighting Range: 15-100 yards; Operation: on/off end cap.

However, with smaller calibers (.17, .204, .223), manual bore-sighting is not so easy. Much less light makes its way down the smaller-diameter bore, and it’s more difficult to find the target on the background. That’s why we welcome two new products from Sightmark. This Texas-based company has developed in-chamber laser boresights for 17 HMR and .22LR rimfire guns. The tiny boresights are correctly dimensioned so they fit in rimfire chambers just like normal 17 HMR or .22LR cartridges. With the boresight in place, simply flick a switch on the battery pack and the laser dot shows exactly where the rifle is aimed. The dot is roughly 2″ in diameter at 100 yards.

Sightmark rimfire boresights are made from brass, so they are gentle on your chambers. The separate battery pack holds two (2) AAA batteries, which will power the laser for about 30 hours. We like the fact that the battery pack is separate. That makes it easier to swap in new batteries, AND, importantly, the battery pack makes it obvious when the boresight is in use. That lessens the chance that someone could mistakenly try to chamber a live round with the boresight in place.

Sightmark Rimfire Boresights Developed After Extensive Comparison Testing
“We tested every competitor’s chamber boresight for the 17 HMR and .22LR currently on the market and found that they did not work well, so we decided to create one that would,” said James Sellers, president of Sightmark. “Our Sightmark 17 HMR and .22LR boresights are as accurate as our other award-winning chamber boresights, so there’s no guessing if you’re on target”. Sightmark 17 HMR and .22LR Rimfire boresights retail for $47.99 and can be ordered directly from the Sightmark Online Catalog.

Adapt Basic Unit to other Calibers with SAAMI Sleeves
Both the Premium and the Professional .223 Boresighters can be used for a variety of chamberings by fitting additional caliber-specific sleeves (sold separately). Each sleeve is precision-machined from brass to SAAMI specs. Available chamber sleeve calibers include:

Bore-Sighting the Old-Fashion Way
We are not big fans of laser bore-sighters, as we think they are unnecessary for most situations — at least with conventional bolt-action rifles. Visual bore-sighting is not difficult. Set up your gun securely on bags, remove your bolt and set up a 50-yard target with a large bright orange or black center circle. Look through the back of the action and you should be able to sight down the bore with your own eyes just fine. In fact it may be easier to bore-sight the “old-fashioned way” rather that try to see a laser in bright sunlight at 50 or 100 yards.

When a Laser Bore-Sighter is Valuable
There are instances when having a laser bore-sighter can save time, such as when setting up a chronograph. Also, with many semiautos and lever guns, it is difficult to sight down the bore because of the action design. Without using mirrors, it’s hard to visually bore-sight an M1 Garand, for example. Likewise, it can be difficult to bore-sight an AR15, because the stock and buffer is in line with the bore. For these rifle types, a laser bore-sighter is a valuable tool.

In-Chamber Laser Should Be Safer
We like the new LaserLyte design because it fits in the chamber, rather than in the bore. In-Chamber laser bore-sighters are also made by Aimshot, Firefield, and SightMark, in a variety of sizes. With muzzle-entry laser bore-sighters, you could have a nasty accident if you forget to remove the device. There is always the chance you could chamber and fire a round with the muzzle-entry bore-sighter still in place. Instant Kaboom. That has happened more than once. The new LaserLyte/Cabela’s bore-sighter fills your chamber, so there is no possibility you could chamber a loaded round with the bore-sighter in place. That’s an important safety advantage. The LaserLyte K-50 in-chamber bore-sighter is shown in the video below.