What Are Mils? Milliradians Explained For Rifle Shooters

Mils are an angular measurement used in rifle scopes, reticles and ballistic corrections. A mil is short for milliradian. In practical shooting, mils give you a simple way to measure misses, dial elevation, hold for wind and communicate corrections.

The easiest practical rule is:

1 mil equals 10 centimetres at 100 metres, or about 3.6 inches at 100 yards.

Most mil-based rifle scopes adjust in 0.1 mil clicks. That means 10 clicks equals 1 mil.

Once you understand that, mils become very straightforward. If your bullet lands 0.5 mil low, dial 0.5 mil up or hold 0.5 mil higher in the reticle. You do not need to convert the miss into inches first if you can see it in the reticle.

What Does Mil Mean On A Rifle Scope?

Mil stands for milliradian. Like MOA, a mil is an angular measurement. It changes size as distance increases.

At 100 metres, 1 mil is 10 centimetres.

At 200 metres, 1 mil is 20 centimetres.

At 500 metres, 1 mil is 50 centimetres.

At 1000 metres, 1 mil is 1 metre.

That distance relationship is why mils are useful for long-range shooting. They give the shooter a consistent angular system for measuring and correcting bullet impact.

Mil Size At Common Distances

Here is the metric version:

Here is the yard version many shooters use:

You do not need to memorise every number, but you should understand the pattern. A mil is angular, so it covers more target space as distance increases.

How Mil Scope Adjustments Work

Most modern mil scopes adjust in 0.1 mil increments.

That means:

• 1 click = 0.1 mil
• 5 clicks = 0.5 mil
• 10 clicks = 1 mil
• 20 clicks = 2 mils

At 100 metres, each 0.1 mil click moves impact about 1 centimetre.

At 100 yards, each 0.1 mil click moves impact about 0.36 inch.

This makes mil scopes easy to run because the turret numbers usually match the reticle. If your impact is 0.7 mil low, dial 0.7 mil up. If your wind hold is 0.4 mil, hold 0.4 mil into the wind.

Example: Correcting A Shot In Mils

Imagine you fire a group and the centre of the group lands 0.6 mil low and 0.2 mil right when viewed through your spotting scope or rifle scope reticle.

If your scope adjusts in 0.1 mil clicks, your correction is:

• 6 clicks up
• 2 clicks left

There is no need to convert that correction into inches or centimetres. You observed the miss in mils, then corrected in mils.

This is one of the main reasons precision-rifle shooters like mil-based scopes. The reticle and turret speak the same language.

Why Mils Are Popular In Precision Rifle Shooting

Mils are common in precision rifle, tactical shooting, military-style reticles and many long-range competitions. They are popular because they work cleanly with modern reticles and ballistic solvers.

Mils are useful for:

• Dialling elevation
• Holding for wind
• Measuring misses
• Communicating corrections
• Using ballistic calculators
• Spotting for another shooter

For example, a spotter can say "impact 0.4 left" and the shooter immediately knows to correct 0.4 mil right. That is faster than saying the miss was a certain number of inches at a certain distance.

Mil Reticles

A mil reticle has hash marks or hold points spaced in mils or fractions of a mil. Many precision scopes use 0.2 mil or 0.5 mil subtensions, depending on the reticle design.

A mil reticle lets you:

• Hold elevation instead of dialing
• Hold wind without touching the turret
• Measure target size
• Estimate distance if target size is known
• Correct follow-up shots quickly

Reticles like the Nightforce MIL-XT are built around this idea. You can read more here: Nightforce MIL-XT Reticle Explained.

Mils vs MOA

Mils and MOA do the same kind of job. They are both angular systems used for scope adjustment and shot correction.

The difference is the unit size.

• 1 mil is about 3.6 inches at 100 yards.
• 1 MOA is about 1 inch at 100 yards.

That does not mean MOA is more accurate. Most mil scopes adjust in 0.1 mil clicks, which is about 0.36 inch at 100 yards. Most MOA scopes adjust in 1/4 MOA clicks, which is about 0.25 inch at 100 yards. In real field shooting, both systems are precise enough.

The bigger question is which system fits your scope, reticle, ballistic data and shooting environment.

If you are comparing the two systems, read Choosing a Scope in MIL or MOA: Which Measurement is Best?.

Common Mil Mistakes

Calling mils "mils of dot"

Mil does not mean "mil-dot", even though many older reticles were called mil-dot reticles. A mil is the measurement. A mil-dot reticle is one style of reticle that uses that measurement.

Mixing mil reticles with MOA turrets

If your reticle is in mils but your turret is in MOA, corrections become slower. A matched mil/mil scope is much easier to use.

Converting everything into inches

You can convert mils into inches, but you often do not need to. If you observe a miss in mils, correct in mils.

Forgetting that mils are angular

One mil is not always the same physical size. It is 10 cm at 100 metres, 50 cm at 500 metres and 1 metre at 1000 metres.

Quick Mil Formula

For metric shooting, the clean rule is:

1 mil = 10 cm at 100 metres

So if your group is 20 cm low at 200 metres:

• 1 mil at 200 metres = 20 cm
• Your group is 1 mil low
• Dial 1 mil up
• On a 0.1 mil scope, that is 10 clicks

For yards, the rough rule is:

1 mil = 3.6 inches at 100 yards

So if your group is 7.2 inches low at 200 yards:

• 1 mil at 200 yards = 7.2 inches
• Your group is 1 mil low
• Dial 1 mil up

Are Mils Better For Long-Range Shooting?

Mils are not magically better than MOA, but they are very common in long-range and precision-rifle circles. The biggest advantage is communication. If your shooting partners, match stages, reticles and ballistic solver all use mils, staying in mils keeps everything simple.

For a shooter starting fresh with precision rifle, a mil/mil scope is usually a very sensible choice. For a hunter already comfortable with MOA, an MOA scope can still work perfectly well.

The system matters less than consistency. Pick one, learn it properly, and keep your reticle, turrets and ballistic data matched.

For the broader ballistic picture behind these corrections, read Long Distance Ballistics Explained.

Final Thoughts

Mils are a practical angular measurement for rifle shooters. They make it easier to dial elevation, hold wind, spot misses and make repeatable corrections at distance.

Remember the simple version:

1 mil is 10 cm at 100 metres, 1 metre at 1000 metres, and most mil scopes adjust in 0.1 mil clicks.

Once your reticle, turret and ballistic data all use mils, the system becomes fast and clean. See the miss, measure it in the reticle, dial or hold the correction, then confirm the next shot.

FAQ

What does mil mean in shooting?

Mil means milliradian. It is an angular measurement used for rifle scope adjustments, reticles and long-range shooting corrections.

How much is 1 mil at 100 metres?

1 mil is 10 centimetres at 100 metres.

How much is 1 mil at 100 yards?

1 mil is about 3.6 inches at 100 yards.

How many clicks is 1 mil?

On most mil scopes, 1 mil equals 10 clicks because each click is 0.1 mil.

Are mils better than MOA?

Mils are not automatically better than MOA. They are very common in precision rifle shooting, but both systems work if your scope, reticle and ballistic data are matched.

What is a mil-dot reticle?

A mil-dot reticle is a reticle design that uses dots or marks spaced in mils. It is one type of mil-based reticle, not the definition of a mil itself.