Nikon 8405 User Guide - Page 17

• Note the power setting that enables the 500(or 600) yard zero and do not move the magnification ring. You might consider a dab of nail-polish to mark the spot so you can return easily. • Move your target to intermediate distances in one hundred yard increments and repeat the firing procedure. Note exactly where your groups form relative to the circles. Do not move the magnification ring on the scope. Note the relationship between the center of each group and the circles and make simple notes to describe the correlations. • Consider moving your targets in 50 yard increments to fine-tune the relationship of the accuracy circles to the actual trajectory of your bullets. • Keep accurate notes of your shooting. You will require good information when you prepare your drop chart. You now have exact zero information for 100, 200, 300, 400, and whatever distance you