Measure 25 yards, you may use a vice or gun rest to assist in holding your weapon on target. While the laser is on the bull’s eye, you can now observe how many inches your scope or iron sights off target (the laser will put you within 1.5 to 2 inches of dead center). Due to the fact that scopes vary, you must follow instructions for your particular scope to adjust the cross hairs to the bull's eye. It is not necessary to calculate the exact number of clicks. You may simply click the reticule up or down, left or right until it is on the bull's eye. The same procedure is used for iron sights.
Remove the Laser Bore Sight after sighting your weapon (if the bore sight stick in the chamber, a cleaning rod may be used to lightly tap the sight out of the chamber) turn the Bore Sighter end cap to the left turn off the laser.
We recommend removing the batteries from the Laser Bore Sight for storage. A battery discharged in your Bore Sighter could possibly destroy your unit.
If after inserting the laser bore sight the bolt cannot be closed, you may sight the weapon with the bolt open. This might be caused by the end switch.
If the impact group of live ammunition shooting is off center after the rifle is zeroed by a newly acquired laser bore sighter (see Fig.1), the axis of the chamber does not coincide with the axis of the barrel on your rifle or the barrel is bent.
You may still use the laser bore sighter to sight by:
Sight your scope and rifle by live bullet firing at a range of 100-150m. Insert the laser bore sight into the chamber. Use the target paper (see Fig. 2) and aim at the center with the range 25-30m away while marking the red dot point of laser boresighter and keeping the record for future use. Later if you want to zero this rifle again, simply aim the laser bore sight point to the red dot point marked and adjust elevation and windage of the scope to coincide the center of crosshair to the zero point on the paper.
Boresighting aligns the optical sight on top of the gun barrel with the axis of your bore, and should be the first priority after mounting your scope. This ensures that your first shot will be on a large piece of target paper at a distance of about fifty yards. Boresighting not only gives you a reference point from which to actually start sighting in your gun, but saves time, ammunition expense, and occasionally your shoulder from recoil.
Bore sighting will NOT sight in your gun. This must be done by firing a specific type of ammunition at a certain distance.
Boresighting is done by several different methods. The oldest way is to remove the bolt on a bolt action rifle and look down the bore. Secure the gun so it does not move, and position it so it is pointing at the bullseye of a target about fifty yards away. Now look through the scope, and without moving the gun, carefully adjust the elevation and windage turrets until the reticle is centered on the bullseye. Simple at that. You are sighted through the bore, or "bore" "sighted." Of course, this is not possible with many guns such as semi-autos, pumps, lever guns, and most handguns.
The next oldest way to boresight is with a collimator and arbors. Arbors are sometimes called spuds. A collimator is a device with a graph-paper-like grid in it that is seen when looking through your scope. It is held in place by arbors inserted into your barrel from the muzzle end. They are sized for your caliber, and held in place by a spring or an expanding plug. The user then looks through his scope and adjusts the windage and elevation turrets so the crosshair is centered on the grid you see. The spuds must be sized accordingly, and although many collimating boresights come with several arbors, some calibers such as .17, or shotgun gauges require their own sizes and may not be available.
Another way to boresight, and the most convenient way, is to use a magnetic boresighter. These simply attach to your muzzle with strong magnets instead of inserting arbors into your barrel. Some people frown upon inserting anything into their barrels besides a cleaning rod. Magnetic bore sighters fit all calibers and gauges, and no other parts are required that can get lost or damaged. Magnetic boresighters can also be used to check zero after transporting your guns, or after a drop or hard use. To do this, sight in you gun and see where your crosshairs end up on your boresighter's grid. Remember the placement or write it down to check zero any time.
The third and final way to boresight is with laser boresighters. Some of these project a laser beam from an arbor or spud inserted into your muzzle, and some have the dimensions of a specific cartridge case that you simply insert into your gun's chamber and close the action. Laser bore sighters do require a somewhat reflective target set some distance away to reflect your laser beam, and a steady hold or a gun vice to more easily center the scope's crosshairs onto the laser's dot.
Points to remember when you are about to use a bore sight:
- No boresighter will sight in a gun. This can only be done by shooting the gun with a specific type of ammo at a certain distance. Every different kind of ammo will have a different point of impact.
- Remember to remove your boresight arbor before shooting. Simple enough, but I've seen some perfectly good barrels blown apart like a peeled banana by people who should've known better.
- Boresighting alerts you immediately to problems with mounting and scope adjustments and saves time, ammunition expense, and often physical abuse from recoil.
- Every shooter should own a boresighter whether he mounts his own scopes or not
Remove the screw on the back of the laser boresighter and insert the best adapter for the caliber of your rifle.
- Step 2
Tighten the screw so the adapter fits snugly in the barrel and slide the boresighter all the way up to the end.
- Step 3
Turn the laser on.
- Step 4
Aim the rifle at a stationary target, ideally at 50-100 meters.
- Step 5
Look though the scope and adjust the elevation and windage until the crosshairs are centered on the red dot.
- Step 6
Remove the boresighter and turn the laser off.
- Step 7
Take the rifle to a range to complete calibrations. Fire several rounds downrange and make any necessary adjustments to the scope in order to properly zero your rifle.
- Step 8
Make sure the rifle is unloaded and place the boresighter in the end of the barrel. Point the rifle at your target and note the position of the dot in relation to the scope crosshairs. This will give you an idea of where to adjust your scope should you need to zero the rifle again.