Whether you are a seasoned competitive shooter, an avid stalker, or just stepping into the world of long-range precision shooting in the UK, understanding MoA (Minute of Angle) and MRAD (Milliradian) is crucial. These are the primary angular measurements used for adjusting optical sights to align your point of impact with your point of aim.
Because these are angular measurements, the physical distance they represent on the target expands as the distance to your target increases. When you adjust your scope turrets, you are modifying the average dispersion of your shots by that given amount; assuming, of course, that your scope tracks precisely and that you’ve factored in environmental conditions, shooter error, and ammunition variances.
In this comprehensive guide, we will break down both systems, explain how to calculate your holdovers, compare their practical applications in the field, and highlight superlative telescopic sights from Zero Compromise Optic (ZCO).
The Golden Rules of Turret Adjustment
Before diving into the mathematics of each system, there are a few foundational principles every marksman should keep in mind:
- Avoid "Clicks": We strongly advise against using the term “clicks” when referring to elevation and windage. Speak strictly in terms of MoA or MRAD (often referred to as "Mils"). This avoids confusion and ensures you use the correct tactical vernacular when working with a spotter.
- Stick to Your System: Fundamentally, neither unit is vastly superior to the other. The secret to success on the range is picking a measurement system and sticking to it on the day. Do not needlessly convert between the two, as this only invites error under pressure.
- Trust Your Adjustments: Don’t be reticent to dial your sights for longer ranges. If your projectile drops 10 MoA over 500 yards, that’s approximately 50 inches of drop (over 1.27 metres). Dialling your turrets is a necessity for precise long-range engagement.
What is MoA (Minute of Angle)?
MoA stands for Minute of Angle, an imperial angular measurement derived from degrees. One Minute of Angle is 1/60th of a degree. This highlights just how incredibly fine these adjustments are, yet they lead to appreciable differences downrange.
- The Baseline: 1 MoA equates to approximately 1 inch at 100 yards (1.047 inches, to be exact). Consequently, the physical space 1 MoA covers grows by 1 inch for every 100 yards of distance.
- Common Adjustments: Most modern MoA rifle scopes feature 1/4 MoA turret adjustments, which provide an excellent balance between precision and rapid field adjustment.
- High-Precision Scopes: Finer 1/8 MoA adjustments are available for disciplines requiring extreme precision, such as F-Class and benchrest. However, for general tactical or hunting scenarios, these micro-adjustments are often lost in the "noise" of environmental shifts, wind drift, and shooter inconsistencies.
How to Calculate MoA Adjustments
To quickly calculate how much 1 MoA covers at your target distance, divide your distance in yards by 100.
- At 200 yards: 1 MoA = 2 inches
- At 500 yards: 1 MoA = 5 inches
- At 800 yards: 1 MoA = 8 inches
If your shot hits 10 inches low at 500 yards, you need to adjust up by 2 MoA (because 1 MoA at 500 yards is 5 inches).
What is MRAD (Milliradian)?
Milliradian, commonly referred to as "Mil" or "MRAD", is derived from the metric system and the mathematical constant Pi. There are 2π Radians in a full 360-degree circle, and one Milliradian is 1/1000th of a Radian.
- The Baseline: MRAD aligns flawlessly with the metric system. Exactly 0.1 MRAD equals 1cm at 100 metres. Therefore, 1 full MRAD equals 10cm at 100 metres.
- Common Adjustments: MRAD scopes typically feature 0.1 MRAD ("tenths") adjustments on the turrets. Finer 0.05 MRAD turrets exist for highly demanding target shooting, but 0.1 MRAD is the industry standard for tactical optics.
- Military Standard: NATO armed forces utilise the MRAD system. If you have a military background or prefer the base-10 logic of the metric system, MRAD will feel incredibly intuitive.
How to Calculate MRAD Adjustments
To calculate how much 0.1 MRAD covers in centimetres at your target distance, divide the distance in metres by 100.
- At 100 metres: 0.1 MRAD = 1 cm (1 full MRAD = 10 cm)
- At 300 metres: 0.1 MRAD = 3 cm (1 full MRAD = 30 cm)
- At 600 metres: 0.1 MRAD = 6 cm (1 full MRAD = 60 cm)
If your shot hits 18cm low at 600 metres, you need to adjust up by 0.3 MRAD (because 0.1 MRAD is 6cm at that distance).
First Focal Plane (FFP) vs Second Focal Plane (SFP)
When choosing between MoA and MRAD, it is vital to consider your reticle focal plane. Premium long-range scopes, like those from Zero Compromise Optic, are typically First Focal Plane (FFP).
In an FFP scope, the reticle increases in size as you increase the magnification. This means your MoA or MRAD subtensions (the hash marks on your reticle) are mathematically accurate at every magnification level. You can use an MRAD "Christmas-Tree" reticle to confidently measure a target or hold over for wind whether you are at 10x or 25x magnification.
MoA vs MRAD: Quick Comparison Overview
For UK shooters, the choice is uniquely subjective. Target shooting ranges in the UK are commonly measured in yards, yet we often use metric measurements in everyday life.
|
Feature |
MoA (Minute of Angle) |
MRAD (Milliradian) |
|
System Base |
Imperial (Yards/Inches) |
Metric (Metres/Centimetres) |
|
1 Unit at 100 Distance |
~1 inch at 100 yards |
10 cm at 100 metres |
|
Common Turret Value |
1/4 MoA |
0.1 MRAD |
|
Precision |
Marginally finer resolution |
Slightly coarser, but faster to calculate mentally |
|
Ideal Application |
Benchrest, F-Class, UK Yard Ranges |
PRS, Tactical, Military, Metric shooters |
Is One Superior?
1 MRAD is equal to 3.438 MoA, meaning MoA technically offers a finer resolution per adjustment. However, the level of perfect marksmanship, stable conditions, and flawless ammunition required to notice that resolution difference far surpasses what most shooters will experience in the field. Choose the system whose underlying maths makes the most sense to you.
Top Scope Picks: Zero Compromise Optic (ZCO)
If you are looking for premium optics available in both measurement systems, Zero Compromise Optic (ZCO) offers some of the finest telescopic sights available today. When mounting these optics for ELR (Extreme Long Range), we highly recommend pairing them with a canted Picatinny rail or dedicated scope mounts (e.g., 20 MoA or 6 Mil cant) to maximise your turret adjustment range.
1. The ZC527: The Ultimate All-Rounder
The ZC527 is a superlative choice for everything from precision rifle series (PRS) to long-range hunting.
- Magnification: 5-27x
- Adjustments: Available in 1/4 MoA or 0.1 MRAD. It boasts a massive 120 MoA / 35 MRAD of total elevation adjustment.
- Reticle Options: ZCO offers intricate "Christmas-Tree" style reticles (like the MPCT1X) in MRAD. These provide extensive ballistic data for holdovers without touching the turrets. If you prefer a less cluttered, cleaner field of view, the MoA reticle options are exceptional.
2. The ZC840: Extreme Precision Target Shooting
Sharing much of its DNA with the ZC527, the ZC840 is geared toward the specialist engaging smaller targets at extreme distances.
- Magnification: 8-40x
- Adjustments: Available in the ultra-fine 1/8 MoA or 0.1 MRAD.
- Application: The powerful 40x magnification makes it ideal for identifying fine target details, spotting splash from missed shots, and competing in F-Class. If you shoot MoA, the 1/8 MoA turrets here provide an incredible advantage for micro-adjustments from a stable, controlled shooting position.
3. The ZC420: Compact & Lightweight Tactical
For those who need top-tier optical performance without the bulk, the ZC420 is a feature-rich solution.
- Magnification: 4-20x
- Adjustments: MoA or MRAD (Maintains the same massive elevation travel as the ZC527).
Application: Perfect for lightweight hunting rifles or tactical setups where overall weight and manoeuvrability across rough, challenging terrain are critical. It offers unparalleled versatility for closer-range woodland stalking while retaining serious long-range capability.
FAQs
Yes, absolutely. While MRAD is base-10 and aligns perfectly with metres, you can still use it on a yard range. You simply need to generate your ballistic data chart (dope card) so that it outputs your drop in MRAD for distances measured in yards.
Yes. MIL is simply an abbreviation for Milliradian (MRAD). If a scope is advertised as having "Mil turrets" or a "Mil-Dot reticle," it is using the MRAD measurement system.
Neither is inherently better for hunting; it depends on how you estimate distance. If you naturally judge distances in metres and target sizes in centimetres, MRAD will be vastly quicker to calculate in the field. If you think in yards and inches, MoA is the better choice.