User manual BUSHNELL PROFESSIONAL BORE SIGHTER 74-3333

[. . . ] Instruction Manual Professional BORE SIGHTER Model # 743333 The Bushnell Professional Boresighter is an essential tool for quickly adjusting scope or iron sights to align with the rifle or handgun barrel. Correct use of your Boresighter will put sighting-in test shots "on the paper", requiring only minor expenditure of time and ammunition by test firing to achieve pin-point zero at a given distance. Because of the many variables involved in both ammunition and the firearm itself, final "sighting in" must be done by actual firing. [. . . ] Select the proper arbor and make sure the expandable tips are completely closed by turning the arbor's locking nut ("A" Fig. 1, 2) counter-clockwise until the tips contract. Insert the small end of the arbor into the Boresighter mount with the flat area down, so that the end of the clamp screw ("B" Fig. Turn the screw clockwise until it is fingertight. Now, with the Boresighter in an upright position, insert the arbor into the barrel and push it forward carefully until the muzzle rests against the tapered section of the arbor (Fig. With the arbor locking nut loosened, and while looking through the scope, swing the Boresighter to align vertical grid lines with the scope reticle. Turn the arbor locking nut clockwise until the arbor holds firmly to the bore; the expandable tips prevent the Boresighter from turning of its own weight. NOTE: To remove the arbor from the barrel, simply loosen the arbor locking nut (Fig. 1), push inward to retract the tips, and pull the unit from the barrel. Pro Boresighter Kit 743333-1LIM. indd 3 4/28/2008 2:56:54 PM HOW TO BORE SIGHT A SCOPE-MOUNTED RIFLE OR HANDGUN Scope/Rifle Combination Once you have secured the Boresighter, place the rifle on a suitable support. Remove the adjustment caps from your riflescope. Then sight through the riflescope and align the reticle with the crosshairs of the graduated grid reticle in the Boresighter by using the riflescope's elevation and windage adjustments. Once you have aligned the riflescope reticle with the graduated grid reticle in the Boresighter, you are ready for sighting-in on the range. If bore sighting has been done properly, sighting-in should take a minimum of time and ammunition. After "sighting-in", don't forget to reinstall the Boresighter and record the reticle position (see pg. [. . . ] How to Make Corrections for Bullet Drop Using the scope adjustments, you can make correction for bullet drop at a specific distance provided the trajectory of the specific load is known. Each graduation on the Boresighter grid is equivalent to 4 inches at 100 yards. When the scope reticle is below the grid center, the gun will shoot high. Model #: 743333 Lit #: 98-1200 / 04-08 Pro Boresighter Kit 743333-1LIM. indd 4 4/28/2008 2:56:54 PM [. . . ]