By Peter Makulek · Senior Optics Editor · · Live prices from UK retailers
Every adjustable rifle scope uses either MOA (Minute of Angle) or MRAD (Milliradian, often called "mil") for its turret clicks and reticle subtensions. Choosing between them is one of the most common questions new precision shooters face — and the answer is simpler than most guides make it seem.
MOA and MRAD are both angular measurement systems. One MOA equals approximately 1 inch at 100 yards (technically 1.047 inches). One MRAD equals 0.1 metre at 100 metres, or approximately 3.6 inches at 100 yards. Neither is inherently more accurate — they are different units measuring the same thing. The practical question is which system makes the maths easier for the way you shoot.

via BushWear
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via Sportsman Gun Centre
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via Sportsman Gun Centre
£10.99
For UK target shooters working in metric distances and metric wind data, MRAD is generally the simpler system — corrections in mils match metric range calculations directly. For hunters or stalkers who think in yards and inches, MOA adjustments feel more intuitive. PRS and practical precision competition in the UK has largely standardised on MRAD — if you plan to compete, mil-based scopes integrate better with the correction cards and ranging maths used at most UK ranges.
The most important rule: match your reticle and your turrets. A scope with an MRAD reticle and MOA turrets (or vice versa) requires constant conversion and is a recipe for errors under pressure. All modern quality scopes are consistent — an MRAD reticle always comes with MRAD turrets. If in doubt, ask the retailer to confirm before buying.
MOA stands for Minute of Angle — an angular measurement equal to 1/60th of one degree. At 100 yards, 1 MOA equals approximately 1.047 inches. Most MOA scopes click in ¼ MOA increments, meaning one click moves point of impact approximately ¼ inch at 100 yards (½ inch at 200 yards, ¾ inch at 300 yards, and so on).
MRAD stands for Milliradian — 1/1000th of a radian. At 100 metres, 1 MRAD equals 10 centimetres (or 1 cm per 10 metres). Most MRAD scopes click in 0.1 mil increments, so one click moves point of impact 1 cm at 100 metres, 2 cm at 200 metres, and so on. Metric calculations are very straightforward.
For UK range shooting and PRS competition (which uses metric distances), MRAD is generally easier because the maths is decimal: 0.1 mil per click, 1 cm per 10 metres. For hunters who zero at 100 yards and make simple hold-over corrections, MOA is intuitive. Both systems work perfectly — the only wrong choice is mixing MRAD reticles with MOA turrets or vice versa.
Mil-dot is a reticle type; MRAD is the measurement unit. A mil-dot reticle uses dots spaced 1 mil apart for ranging and holdover reference. Modern MRAD reticles often use hash marks or Christmas-tree patterns rather than simple dots, but all are based on the same 1 MRAD unit. "Mil" and "MRAD" mean the same angular quantity.
1 MRAD = 3.438 MOA (approximately 3.44 MOA). So if you need to move 1 mil, that's about 3.4 MOA clicks. For practical shooting it's much simpler to stay in one system: MRAD for metric distances, MOA for yards/inches. Conversion at the range under time pressure is error-prone and unnecessary if you choose the right system from the start.
For MRAD subtensions on the reticle to be accurate at all magnifications, you need a First Focal Plane (FFP) scope. On a Second Focal Plane (SFP) scope, the MRAD marks on the reticle are only correct at one specific magnification (usually maximum). For turret-only adjustments without using reticle subtensions, SFP is fine — the turret clicks are always the same regardless of power.
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