Badger Ordinance: Angle Cosine Indicator with MkII Rail ~ Rex Reviews

I don't want to do trigonometry in the field? If you are shooting up slope or down the slope you cannot neglect the difference between the true range and the actual horizontal range to your target. Instantaneously knowing the cosine of your angle of fire can expeditiously get you on target without the use of a scientific calculator, charts, or trigonometry. Simply take the cosine angle as indicated on the instrument and multiply it by your true range to the target, that is the distance you will dial in for your gravitational drop. Atmospheric corrections will be done according to true range. This is one heck of a handy tool that anyone in rugged terrain should have on their long range precision rifle.