The discussion opens with a refresher on MOA and how it works as an angular measurement. Both MOA and mils measure an angle that creates an arc, which is then used to translate scope adjustments into movement on the target. The simple field rule for MOA is restated: at 100 yards, 1 MOA is effectively 1 inch, even though the true value is slightly over an inch. At 200 yards, 1 MOA is about 2 inches, at 300 yards about 3 inches, and so on. This rule helps shooters understand how much area a reticle covers and how many clicks are needed when adjusting a scope that tracks in MOA, such as the Nightforce optic mounted on the Mark 13 rifle shown on the table.
The conversation shifts to mils, also called MRAD or milliradians, and how they compare to MOA. A quick rule of thumb is introduced: at 100 yards, 1 mil equals 3.6 inches of adjustment. Mil-dot and MRAD are treated as essentially the same concept, with the mil being a subdivision of a radian. The Crimson Trace scope on the Proof Research Mountain Tactical Rifle in .300 Win Mag is used as an example of an optic that adjusts in 0.1 mil increments. While MOA uses the 1 inch per 100 yards rule, mils use 3.6 inches per 100 yards, giving shooters another angular system to translate scope movements into point-of-impact changes on the target.
The mil-dot reticle on the .300 Win Mag rifle is used to illustrate how mils appear in the scope. Each dot on a leg of the crosshair is spaced 1 mil apart from center to center. The Crimson Trace optic adjusts in 0.1 mil increments, so a full mil of adjustment equals 10 clicks. If a shooter needs a 2 mil correction at 100 yards, that translates to 20 clicks. This is contrasted with a quarter-MOA scope, where four clicks equal 1 MOA. The hosts point out that when someone appears to be making large adjustments on a mil-based scope, the actual movement of the turrets can be quite small because each click represents only a fraction of a mil.
The explanation dives deeper into the geometry behind mils. A full circle is 360 degrees, which corresponds to about 6.28 radians. A radian is defined by taking the radius of a circle and wrapping that length along the circumference. A milliradian is a thousandth of a radian, and a mil-dot is based on that unit. One milliradian is approximately 0.0573 degrees. At 100 yards, this angular size corresponds to about 3.6 inches of linear distance, which is where the 3.6-inch rule comes from. A small angle from the center of the circle out to the edge represents the coverage of one mil on the target, and that relationship is what shooters exploit when dialing or holding for corrections.
The hosts describe how to turn observed misses into mil adjustments at various distances. One approach is to stay entirely in angular terms: if the impact is measured as 2 mils off in the reticle at 100 yards, the shooter simply dials 2 mils, or 20 clicks on a 0.1 mil turret. The same 2 mil correction would still be 20 clicks at 200 yards, because the scope is adjusting angle, not inches. When a spotter instead calls a miss in inches, such as 24 inches at 200 yards, that distance must be converted into mils. At 200 yards, 1 mil is 7.2 inches, so a 24-inch miss is a little under 3 mils, leading to an approximate 2.8 mil correction, or about 28 clicks on a 0.1 mil scope.
Beyond corrections, the fixed relationship between mils, target size, and distance allows shooters to estimate range. If the shooter knows the actual size of a target and can measure how many mils it spans in the reticle, distance can be calculated using that constant angular relationship. The discussion then returns to the comparison between MOA and mil systems. Both measure angles and accomplish the same task, so neither has an inherent performance advantage. A quarter-MOA click and a 0.1 mil click are both fine adjustments, just expressed in different units. The choice often comes down to which system makes the math easier for the shooter in the field.
The hosts compare how mils and MOA interact with metric and imperial measurement systems. In imperial terms, mils rely on the 3.6 inches per 100 yards rule, which involves more complex mental math than the simple 1 inch per 100 yards rule for MOA. In metric, mils align more cleanly because meters and centimeters follow a base-10 structure, making range and adjustment calculations more straightforward. MOA tends to be favored when thinking in yards and inches, while mils are often preferred when working in meters. The conversation closes with an example from Marine Corps marksmanship, where distances and data may be mixed between yards and meters, underscoring the importance of being comfortable with both systems and understanding how each angular unit relates to the chosen distance scale.
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