There are four scopes in Arma 3 that use the milliradian marking system (mil-dots). Any correction that applies for a weapon using one of these scopes, is the same across all scopes.

These scopes are the AMS, the Kahlia, the LRPS and the MOS.

The apparent difference in mark distance results from the different zoom values.

For more info on the scopes, and instructions on using the DMS with these rifles (the non-milliradian scope), check this guide.

After making a guide covering milliradian adjustments for use with long range rifles, I decided to tackle the same issue, but in the Designated Marksman Rifle class. The challenge here was coming up with an arbitrary set of conditions under which to create the charts. The designated marksman serves two distinct functions: placing offensive fire from a distance, and retaliating against a distant attack on the squad. These circumstances have different requirements, as in the first one the DM has the upper hand and decides when to engage, while in the second, there is no time for precise preparation.
With that in mind, I decided to create two different sets of charts per rifle:

• a chart showing the adjustments for adding or subtracting 100m to a zeroed range;
  
• a chart featuring the required adjustments to engage targets within a broad range of distances, based on an initial zeroing;

The first chart is useful for when setting up an offensive, when the location of the targets is known and the rifle can be zeroed to the closest hundred meter step. The adjustments allow for precision shots to be placed on targets at ranges withing a 200m interval around the zeroed range.

The second chart is useful when retaliating from an attack, when the approximate range can be discerned, yet there is no time to be adjusting the zeroing, or when doing so could leave you vulnerable to targets at closer range. I chose to employ two zeroing values: 300m and 500m. I did not use a lower zeroing value because not all milliradian scopes are able to be zeroed below 300m.
With the information in these charts one should be able, using a DMR and a milliradian scope, to place shots anywhere between 100m to 800m without readjusting the zeroing.

Note: even though the Mk18 ABR is classified as an assault rifle, it allows for a level of precision compatible with the marksman role. For this reason I included it in this guide. This weapon seems to serve as a bridge between the assault rifle class and the DMR class, much like the MAR-10 bridges the DMR class and the sniper rifle class.

tl;dr: For each rifle there are two charts: one with adjustments to add or subtract 100m from the present zeroing, and another which indicates adjustments to employ when using a set zeroing while engaging targets at any medium-range.

Though the charts go up to 1000m, many of these rifles lose a lot of effectiveness at ranges above 800m.

This rifle is intended to be used at 100/200m for silent infiltration and similar tactics. The "Designated Marksman" label is misleading. I'm not sure why this rifle is classified as a DMR.

Dslyecxi made a video explaining the use of this rifle in detail.[/code]

This rifle uses the 9.3x64mm caliber, slightly bigger yet a bit slower than the .338 Lapua Magnum, which means it has about the same power, while having a shorter effective range.


example:
if unsuppressed with the scope zeroed at 500m, to hit a target at 700m aim 2.5 mil-dots below center

Work in progress

As mentioned on my long range rifle guide, this weapon is a beast. Among the DMRs it is by far the most precise, with the longest effective range.

For charts on longer ranges, go check that guide.


example:
if unsuppressed with the scope zeroed at 500m, to hit a target at 700m aim 2 mil-dots below center

example:
if unsuppressed with the scope zeroed at 500m, to hit a target at 700m aim 2.75 mil-dots below center

example:
if unsuppressed with the scope zeroed at 500m, to hit a target at 700m aim 3.25 mil-dots below center

example:
if unsuppressed with the scope zeroed at 500m, to hit a target at 700m aim 4 mil-dots below center

example:
if unsuppressed with the scope zeroed at 500m, to hit a target at 700m aim 2.5 mil-dots below center

example:
if unsuppressed with the scope zeroed at 500m, to hit a target at 700m aim 4.5 mil-dots below center

Work in progress

It is highly unlikely I'll ever go through the trouble of assembling a set of tables illustrating the bullet flight times for ten different rifles, especially considering how little purpose said tables would actually serve. Unlike sniper rifles, DMR rifles are used in firefight situations and even though it is ideal, hitting the target with a single shot is not a paramount goal, especially since many of these rifles can't take down a distant target with only one hit.

I have never in my life held a real firearm in my hands. My ballistics knowledge is limited to the physics involved and my experience in videogames Those are mostly the S.T.A.L.K.E.R. and Sniper Elite series, plus Arma 3. Counter-Strike doesn't count, as it uses "lasers" instead of ballistics.

Therefore, if you find any wrong value in this guide PLEASE let me know, I will correct it and credit you.

Over 1800 shots were fired in the making of this guide.

I did the measurements for the mil-dot adjustment charts using the "Lupus' Training Grounds Version 1" scenario (by Lupus).

I would like to thank nickweddup, for our conversations on the subject, which allowed me to decide on which format to use for these charts. This was challenging, considering how different the context is from the long range rifles guide.

I hope you enjoyed this guide. I have improved on it as much as I intended to, and I consider it a finished project (minus the flight times section, still not completed). However, if you think something could be added to the guide to make it better, feel free to suggest.

Deimos F