This video provides a basic description of the BDC or bullet drop compensating reticle and the Mil Dot reticle to help you compare and decide which would be right for you and your application....
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To take the point a little further, it doesn’t even matter if your bullet drop compensator is calibrated to the bullet type, or even the caliber that you’re shooting. It can still serve as a useful indicator of bullet trajectory, and allow for accurate shooting over extended ranges, provided you gather a little information on the range, just as you would have to with any other scope.
Bullet Drop Compensators. Bullet Drop Compensators (BDC) are simply target style elevation turrets on a rifle scope which are calibrated in yards rather that the standard MOA (or ¼ MOA clicks). By simply turning the BDC turret to display the proper yards to target, rapid adjustments for bullet drop at varying distances can be made.
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
The Nikon M-308 is a well-made bullet drop compensator riflescope and the best you will find at this price point. It features a quick focus eyepiece which makes it delivers instant target acquisition. The multi-coated optics allows for improved light transmission and lower reflection. Windage and elevation can easily be adjusted on this product.
The Axeon® Second Zero® is out-of-the-box weapon ready. It's the fastest way to compensate for bullet drop at extended range. The Second Zero® shifts a target image up by the same number of inches a bullet drops over a specified distance. So if a bullet drops by 7 inches because of gravity, the Second Zero® shifts the image up by 7 inches.