This is a discussion on Tactical Supplement for the Milliradian Dot Reticle by Leupold within the Defensive Rifles & Shotgun Discussion forums, part of the Related Topics category; Most shooters have no clue what milliradian means and most who use a scope be they civilian sporting & recreational shooters, hunters or law enforcement ...
Most shooters have no clue what milliradian means and most who use a scope be they civilian sporting & recreational shooters, hunters or law enforcement typically have no thought to adopt the milliradian type reticle.
The commercial sector has many other reticle types out there that allow for range estimation including for specific game animal hunting purpose.
But those among the military where the milliradian reticle originates from for distant anti-personnel use, and those civilians who do use them, have enjoyed this relatively obscure system.
With that I figured I'd post up this tutorial on the systems use which is the second most concise and most well written piece on the subject that I've come across to date.
The Leupold Mil Dot Reticle uses two distinct dot shape variations—round and “football.”
Both styles employ a system based on the subtension of one milliradian (mil) from the center of one dot to the center of the next. This is also the distance between the crosshairs and the first dot.
The subtension of 1 mil equals 3.6 inches at 100 yards or 36 inches at 1,000 yards. In metric units, the correspondence is 1 mil equals 10 centimeters at 100 meters or 1 meter at 1,000 meters. Knowing this subtension and knowing the size of the target (or a reference object near the target) allows the distance to the target to be estimated with considerable accuracy...
The full document can be found at; http://www2.leupold.com/resources/do...ion_Manual.pdf
First most concise explanation but lacking in _why_ does this work detail:
How to Estimate the Range of a Target Using a Scope
By PeterT, eHow Contributing Writer
How to Estimate the Range of a Target Using a Scope | eHow.com
A video showing how it works:
YouTube - Mil-Dot Demonstration
also on a side note, mil dot ranging only work on large objects, say 36" or larger, and you need to know how many inch's or Meters that object is for it to work.
IE: small things like varmits its useless for ranging, but good to use known hold overs
Free Ballistic Calculator (FREE Ballistic calculator)