They provided the bullet drop numbers in cm and the mils needed to adjust. The chart above provides real ballistics using Federal Premium's calculator. However, there seems to be differing values when it comes to figuring out the mils using the metric system. Round it, and I have 4.1 mils that confirms the numbers on the chart above. You can print out the chart above or play around with the math until it’s burned into your brain.īullet drop / 1 mil size for that distance = mils needed to adjustįor example: At 500 yards I take my 73 inches of drop and divide it by what I know 1 mil equals at 500 yards which is 18 inches.ħ3” / 18” = 4.06 mils that I need to adjust for bullet drop. With that said, let’s give you the formulas to figure out what 1 mil translates to in size at any distance. are already accustomed to inches, feet, and yards, we’re going to provide formulas for this system and the metric system, so you can use whichever you naturally find to be useful. Since most shooters and hunters in the U.S. However, for sighting in and tracking rifle scope consistency, we'll take you through the math of when knowing the linear distance and using it to get a mil correction is helpful. This means it's always best to learn how to get a correction in mils by using your reticle without involving linear distance into the equation. Adjustments and measurements using the scope reticle are, of course, made in MILS regardless of the unit of linear measurement. It’s now better to know both systems to effectively communicate linear distances. This makes it easy to be on the same page when you are working with a team that includes spotters and marksmen who are familiar with the metric system, and vice versa. There is a definite advantage to learning the metric system. You measure from the center of one dot to the center of the next dot and that equals 1 mil. A dot does not equal 1 mil, but the space between it does. Many mil scopes employ a dot to indicate this milliradian measurement. Using only a fraction of 1 radian for measuring means using very small angles that can drastically change bullet impact down range.īut, where does the "dot" in Mil-dot come in? Instead, realize that radian and milliradians are another unit of angular measurement that is mostly seen in calculus and physics, but we use it for shooting too. Confused? Yeah, don't think in terms of degrees. However, the math ends up adding to 1 radian is approximately 57.296 degrees. You may have seen it said that 1 mil is the same as 1/60 degrees. Most people are familiar with measuring this arc in degrees. This means there are approximately 6,283 milliradians in a complete circle. With that said, there are a little over 6 radians in a circle. Graphic by Simon Cuthbert (Own Work) for Target Tamers
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