MOA vs MRAD — Which Reticle and Turret System Should I Use for Long-Range Shooting?
Use MRAD (milliradians) for precision and long-range shooting. MRAD is the modern standard used by military, competition, and most serious long-range shooters. The math is simpler in the field (base-10 adjustments), turret values are more intuitive, and nearly all advanced ballistic calculators default to MRAD. MOA works fine and has a very slight edge in precision per click, but MRAD is what you should learn if starting fresh.
Why It Matters
Your reticle and turret system is the language you use to communicate with your scope. Once you commit to a system, your ballistic data, range cards, and muscle memory are all built around it. Switching later means relearning everything. The most important rule is matching your turrets to your reticle — MRAD turrets with MRAD reticle, or MOA turrets with MOA reticle. Never mix them.
The Detail
What they are:
- MOA (Minute of Angle): 1 MOA equals approximately 1.047 inches at 100 yards. Most scopes adjust in 1/4 MOA clicks (0.25 MOA per click).
- MRAD (Milliradian): 1 MRAD equals approximately 3.6 inches at 100 yards (or 10 cm at 100 meters). Most scopes adjust in 0.1 MRAD clicks.
Precision comparison:
- 1/4 MOA click: moves impact 0.26 inches at 100 yards
- 0.1 MRAD click: moves impact 0.36 inches at 100 yards
- MOA has approximately 30 percent finer adjustment per click
- In practice, this difference rarely matters — both systems are precise enough for 1,000+ yard shooting
Why MRAD is preferred:
- Base-10 math: 1 MRAD = 10 cm at 100m, 20 cm at 200m (easy mental math)
- Spotting corrections are simpler: "hold 0.3 left" vs "hold 1.25 left"
- Military standard worldwide (NATO uses MRAD)
- Most precision rifle courses teach MRAD
- Ballistic apps default to MRAD
- Reticle subtensions (hash marks) are in clean 0.5 or 1.0 MRAD increments
Why some shooters prefer MOA:
- Finer click adjustment (1/4 MOA vs 0.1 MRAD)
- Familiar to American shooters (inches and yards)
- Older scopes and rifles may be MOA only
- Hunting scopes are predominantly MOA
The critical rule: NEVER mix systems. An MRAD reticle with MOA turrets (or vice versa) means you cannot use your reticle holdovers to confirm turret adjustments. This leads to errors in the field when speed matters.
Build Impact
When buying a precision scope, specify MRAD reticle with MRAD turrets (often listed as MIL/MIL). Budget scopes sometimes default to MOA — check carefully before ordering. All your ballistic data, DOPE cards, and range notes should be in your chosen system. If you train with MRAD, buy all future scopes in MRAD. The Vortex Viper PST Gen II and Razor HD Gen III are both available in MRAD FFP configurations and are excellent choices.