USING THE BDC DIALS WITH YOUR BANNER RIFLESCOPE
1.SIGHT-IN YOUR RIFLE AT THE RANGE WITH THE BDC SCOPE (71-3510 and 71-3946)
A. With the riflescope mounted on the rifle, remove the elevation cap. If there is a BDC dial in place of the cap, remove the screw and dial using a coin (see Fig A and Fig A). (Grasp the knurled section at the top of the BDC dial, (Fig A, Part # 2), and lift upward, disengaging the dial from the elevation adjustment).
B. Sight-in your rifle, firing a group of at least three shots at a 100 yard target (for sighting in at another range, see note below). Note the point of impact in relation to the center of the target. Using a coin inserted in the top of the elevation adjustment, (Fig C, Part #3), turn the adjustment the required number of clicks to make the necessary point of impact move. Make appropriate adjustments to the windage knob to bring the point of impact to the center of the target. Fire another group to see if the proper adjustment has been made. Repeat as necessary until the center of the group is in the center of the target.
2. SELECT AND INSTALL THE DIAL
Once the rifle is zeroed-in, select and install the proper BDC dial for your caliber and bullet weight in the following manner:
A.From the Dial Chart select the proper dial for use with your caliber and bullet weight combination. The 3-9x40 scope (model# 713946) comes with 10 interchangeable, calibrated dials and one blank dial. The 3.5-10x36 scope (model# 713510) comes with 5 interchangeable, calibrated dials and one blank dial. The blank dial has a special surface which allows you to make your own distance markings for any cartridge not included on the full Dial Chart. Due to the wide amount of cartridges which are available, we have only included a few of the most popular ones in this guide. The full Dial Chart is available at: http://www.bushnell.com/customer_service/manuals/riflescopes/BannerBDCDialChartFullList.pdf
B.Once you have selected the proper dial, install it in the reverse order of Fig A and B, being careful to align the 100 yd mark with the tick mark below the window on the elevation control (see Fig D). Tighten the screw making sure you have not rotated the knob and that it is still on 100 yds.
3.USING THE BDC RIFLESCOPE
The BDC dial (bullet drop compensator) automatically adjusts elevation to take into account bullet hold over for distances beyond the sight-in distance. Once you know the distance to the target adjust the BDC dial to that distance. You have now corrected for bullet drop.
SPECIAL NOTES:
1. If you are using special or wildcat loads not covered by the Chart, it will be necessary to sight-in your scope by following the sight-in procedure above. The desired point of impact at a given distance will have to be determined by actual firing until zero-in is achieved. Using the blank BDC dial, mark the desired distance in yards or meters on the dial with an indelible pen. Each increment or change in distance will have to be determined by the same sight-in procedure. Reinstall the retaining screw (Part #1) and tighten securely. The rifle and scope are now ready for field use. As long as the same (or a ballistically identical) cartridge is used, you may fire at any distance without hold-over up to the distance indicated on the dial, simply by turning the dial until that distance marking is centered in the clear window.
2.Sighting in at a range different than 100 yds – although the dials are set to a 100 yd sight-in, it is still possible to use them with a different sight-in distance. For example, suppose you would like to sight-in at a distance of
200yds. Proceed as outlined above using a 200 yd distance. When you install the BDC dial, put the dial on the 200 yd mark instead of the 100 yd mark.
3.Model 71-3510 only – although the scope can be used for any caliber, it is ideal for the 17 caliber loads. A special chart has been included for the 17 caliber loads.
Part #1
Fig. A
Part #2
Part #3
Fig. B
Part #3
Fig. C
