The leupold SAbot Ballistic Reticue provides you with three different power positions, indicated by 2 pellets, 3 pellets, and a shotgun shel on the (power ring) within the magnification level indicators. These are provided to allow you to select the hold points best suited to the laod you are using. The reticule assumes polymer-tipped sabots will be used throughout. As an example a .50 cal sabot with a 250 grain 45 cal Hornady SST/ML bullet exiting muzzle at 2200 fps (3 pellets/150 grain of powder) would require the use of 3 pellets setting. The same sabot/bullet combination with a muzzle velocity of 1890 fps (2 pellets/10 grains of powder) would require the use of the 2 pellet setting. 12 guage shotgun applications would use the shotgun shell setting, a 350 grain FPB at 1950 fps is ideally suited for use on the 12-gauge setting, and a 20-gauge shotgun loads would use the 2 pellet muzzleloader setting.