MOA vs Mil Scopes

Why MIL vs MOA Confuses Scope Buyers

The video opens with Clint introducing a common dilemma: a viewer is building a long-distance rifle from ClassicFirearms.com and is stuck choosing between MIL, MOA, and MRAD scopes. The hosts explain that this confusion is widespread because these are different angular measurement systems built into optics. Matt starts by recapping MOA, or minute of angle, as an angular unit where shooters use the rule of thumb that 1 MOA is about 1 inch at 100 yards, scaling proportionally with distance. They point out that MOA shows up both in reticle subtensions and in turret adjustments. The conversation then shifts toward MIL and MRAD, setting up that these are milliradian-based systems used for the same purpose: to translate what the shooter sees in the scope into precise elevation and windage corrections on target.

MOA, MIL, and Click Values on Modern Scopes

Building on the introduction, the hosts compare MOA and MIL in practical scope use. They reiterate that MOA is an angular measurement often approximated as 1 inch at 100 yards, and that scopes commonly adjust in 1/4 MOA increments. They contrast this with MIL/MRAD, explaining that 1 mil subtends about 3.6 inches at 100 yards. Using real optics examples, they reference a Nightforce scope set up in MOA and a Crimson Trace mil-dot scope mounted on a Proof Research Mountain Tactical Rifle chambered in .300 Win Mag. The discussion highlights how turrets are marked: a typical mil-based scope uses 0.1 mil clicks, meaning 10 clicks equal 1 mil. To dial a 2 mil correction, the shooter would spin 20 clicks. This segment grounds the abstract math in concrete turret movements and shows how both systems serve the same function with different numbers.

Radians, Milliradians, and Converting Misses to MILs

The focus shifts to how mil-dot reticles and the underlying math actually work. The hosts clarify that in a mil-dot reticle, the measurement is taken center-to-center between dots, and each interval equals 1 mil. They briefly explain the geometry: there are roughly 6.28 radians in a circle, and milliradians are simply thousandths of a radian, which is why 1 mil at 100 yards covers about 3.6 inches. From there, they demonstrate how to translate an observed miss into a mil correction. If a shooter misses by, for example, 24 inches, that linear distance must be converted into an angular value based on the range. At 200 yards, each mil is about 7.2 inches, so a 24-inch miss equates to roughly 3 mils of adjustment. The hosts emphasize that the required correction always depends on distance, and they note that the metric system’s base-10 structure makes these conversions and range estimations with mils much easier than doing the same math in inches and yards.

Metric vs Imperial: Mental Math with MILs and MOA

This section digs deeper into why mil/mrad scopes pair naturally with the metric system. Because mils are base-10 and metric distances are in meters and centimeters, shooters can quickly relate target size, distance, and reticle measurements without awkward fractions. The hosts revisit the 200-yard example where a 24-inch miss works out to about 3 mils, and they explain that the same mil-based reticle can be used in reverse to estimate distance if the shooter knows the target’s actual size. They then compare the apparent precision of 0.1 mil clicks versus 1/4 MOA clicks. While 1/4 MOA sounds finer on paper, the real-world difference in adjustment size is small. In imperial units, MOA is often easier for mental math because 1 MOA is close to 1 inch at 100 yards, making quick corrections intuitive. By contrast, remembering 3.6 inches per mil at 100 yards is less convenient in inches and yards, but becomes very straightforward when everything is in meters.

Real-World Use, Mental Math, and Focal Plane Choices

The conversation broadens to how shooters actually use these systems in different environments. The hosts note that mil-based optics fit naturally with metric distances, giving simple, even-number calculations for those who think in meters. They describe how the Marine Corps complicates things by mixing yards and meters: ranges may be laid out in yards while scorebooks and data are in meters, partly for NATO interoperability. This forces Marines to juggle conversions while shooting. The hosts stress that serious distance shooters must be comfortable doing mental math for unknown target sizes, unknown distances, and moving targets, all using the information in their reticles. They then explain the difference between second focal plane (SFP) and first focal plane (FFP) mil-dot scopes. SFP reticles are usually only mil-accurate at a specific magnification, often the maximum, while FFP reticles maintain correct mil spacing at any magnification and reveal more detail as power increases, which can justify their higher cost.

First Focal Plane, ACOG Stadia, and BDC vs MIL Systems

Continuing the focal plane discussion, the hosts describe how first focal plane reticles scale with magnification and are often perceived as more expensive because they effectively handle more of the ballistic thinking for the shooter. One of them shares experience with an ACOG that uses horizontal stadia lines on the vertical crosshair to bracket a man’s shoulder width at different stadia marks, such as 4 or 6, to estimate range and choose the correct point of aim. That optic’s turrets only show direction, like up or right, without explicit measurement units, reinforcing reliance on the reticle. They then explain bullet drop compensator (BDC) reticles, which are caliber-specific and tied to a known zero, such as 100 yards, so each line corresponds to approximate impact points at longer ranges like 400 to 600 yards. In contrast, mil-based reticles and turrets are not caliber-specific and provide pure angular measurements, such as missing by 3 mils. Manufacturers like Leupold can supply custom turrets matched to a shooter’s specific caliber and load, allowing either direct mil-based corrections or converting observed linear misses into mil adjustments.

Choosing MRAD or MOA and Typical Shooting Distances

In the closing segment, the hosts return to the core idea that both mils and MOA are simply angular measurement systems that let shooters quantify misses and dial corresponding scope corrections. One speaker notes a personal preference for MOA, finding it easier to use, especially in an imperial context. They offer a straightforward guideline: choose MRAD if most shooting is done in metric units, and choose MOA if working primarily with American or imperial measurements. Viewers are invited to comment with their own preferences between first and second focal plane scopes, and between MOA and MRAD reticles, as well as to share typical shooting distances and setups. The hosts mention examples like running a Mk13 and engaging long-range targets out West out to about a mile, contrasting that with more constrained ranges in the Carolinas, where 500 yards at Take Aim Training is the longest one of them has shot locally. This grounds the technical discussion in realistic shooting scenarios and helps viewers relate the choice of system to their own environments.