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We sincerely appreciate your trust in our products. Nikon riflescopes offer superior optics, rugged construction and reliable performance. Your new Nikon scope offers an intangible that is essential to good shooting-confidence. Whether you are firing the final shot into a one-hole group or placing your crosshairs on the trophy of a lifetime-you can trust that your Nikon will do its job. Your riflescope features Nikon’s new BDC reticle (Metric). BDC stands for Bullet Drop Compensation-a fancy term for hold-over. If a longer shot presents itself, the BDC will provide confident hold-off capabilities if the shooter has done his homework. This simple, effective reticle design can be custom tailored for the trajectory of your ammunition. The “ballistic” circles on the lower vertical crosshair enable you to accurately compensate for bullet drop out to at least 457.2 m (500 yds) with most calibers. Nikon has designed this BDC reticle to blend simplicity with accuracy-a difficult challenge considering the huge number of variables involved in placing a bullet drop compensating scope on a rifle. These would include: . The mounting system and how true it positions the scope to the center-line of the bore . The make, model and caliber of rifle involved . The rifle’s condition and inherent accuracy . The ballistics performance of the ammunition-accuracy, velocity, uniformity and bullet characteristics such as ballistics co-efficients. . A final variable is you - the shooter! 1 Mounting the Scope on your Rifle Your new scope must be properly mounted to ensure accurate and reliable use in the field. Here are some of the basics: . All base and ring screws should be properly tightened. Now for the neat trick! Replace the rifle in the shooting rest and place the crosshair intersection on the aiming dot. Without moving the rifle, move the crosshairs to the bullet hole. The rifle must remain absolutely stationary as the adjustment is made. Best to have a friend carefully turn the turrets while you look through the scope and provide directions. Fire one shot to confirm that your scope is now zeroed on the close range dot. Make minor corrections if required. The object is to get the point of aim identical to the point of impact. Now move your large target paper to 91.44 m (100 yds). Enlarge the aiming dot to 5.08 cm (2 in) with your felt pen. Place small pieces of masking tape over the short-range bullet holes or simply mark them with the felt pen. Now fire a shot and again the bullet should hit somewhere on the large target paper. You can repeat the previous technique of moving the crosshairs to the bullet or simply measure how much correction will be required to bring the bullet to the aiming dot. If you are 15.24 cm (6 in) low and 10.16 cm (4 in) right, move the elevation turret 24 clicks up and the windage turret 16 clicks left. Once again-the objective is to get the point of aim identical to the point of impact. 2 Using the Nikon BDC Reticle (Metric) You have no doubt noticed the series of round circles in the lower vertical section of the BDC reticle (Metric). These circles are positioned to enable accurate placement of shots out to 365.76 or 548.64 m (400 or 600 yds), depending on the caliber of your rifle. The NIKON BDC reticle (Metric) system is user-adjustable. The shooter can actually tailor the performance of the reticle to his particular rifle and load. Nikon suggests the use of a laser rangefinder to ensure accurate distance determination for longer shots. Nikon offers a complete line of rangefinders that are optimized for hunting. We must know the distance to our target for correct hold-offs. There are two challenges for accurate placement of shots-bullet drop and wind drift. Wind drift is the most difficult since wind speed and direction are infinite variables. At 457.2 m (500 yds) a sixteen kilometer (10 mi) per hour cross-wind can drift a bullet up to 0.61 m (2 ft) depending on velocity and bullet design. There is only one way to learn to shoot in wind and that is getting out there and shooting in windy conditions. Keep notes on wind speed and wind direction in relation to bullet travel because this information is easily forgotten. Trajectory is much easier to handle since gravity affects our bullets quite uniformly. The Nikon BDC reticle will become your partner as you prepare for the eventuality of long shots. Close shots are recommended but some game species and habitats require longer shooting. Shots past 228.6 m to 274.32 m (250 to 300 yds) require hold-offs with most popular hunting cartridges. 3 Nikon has developed a simple technique for tuning the accuracy circles in the BDC reticle (Metric) to the trajectory of your particular load. The bottom line is that we must shoot under controlled circumstances so that reticle performance can be tailored properly. This requires a safe shooting location, large targets to ensure catching every bullet, good shooting rests and a uniform loading technique. The range mu...