OSPREY 6-24X50 RIFLE SCOPE Any size target can be easily ranged using a simple formula: Target size in inches /MOA x 100 = Range in yards To determine the range of an object in yards: 1. Determine the targets size in inches. 2. Divide that number by the amount of MOA on the reticle. 3. Multiply the number by 100. Example: 18" target, target height is 6 MOA. The range to the target is 300 yards. (18 Divided by 6 = 3 x 100 = 300 yards) Once the range is determined select an appropriate hold point on the bullet dropof your cartridge. The vertical spacing can be easily split into 1 MOA increments to further enhance long range accuracy.