#### DMCI

##### Well-Known Member

Have you noticed that many scopes have windage and elevation knobs calibrated in MOA (minutes of angle), then they do something really silly. They go over to Europe and get the reticle from the Metric Scope.

See metric scopes have the knobs calibrated in centimeters. Really nice because 1 mil at 100 meters is exactly 10 cm, or 1 Mil at 1000 meters is 1 meter, absolutely and exactly. or put another way, each mil dot subtends exactly 10cm at 100 meters.

Their WORM formula is as follows:

Height Target (Meters) x 1000

-------------------------------- = Range (meters)

Height Target (Mils)

but what is 1 mil at 100 yards? 3.6 inches. What sense does that make?

or this:

Height of target(in) x 27.7

--------------------------- = Range (Yards)

Height of target(mils)

What about the "WORM Formula" for this baby?

Here it is:

Target Height (in) x 100

------------------------- = Range (Yards)

Target Height (MOA)

Like the metric system, we now have a scope where the reticle, and the knobs are all in the same system.

Example of range calculation:

72" target subtending 12 MOA

72 in. x 100

--------------- = 600 yards

12 Moa

and, let say the come up is 15 moa, you just put the 15 mark on the target and squeeze.

What about the windage. You just dial in what you need (in moa on the knob) and there you go.

You can also put the 90 click knob on a USO scope and have 45 minutes of adjustment in a single rotation of the knob!

Well, how about that! Nice easy formula, one common unit, just like our European cousins.

Oh, and I am going to shoot squirrels with mine. Squirrel is 9 inches tall, and subtends 10 moa. The range is...... Well, you know!

D.

Note: What I referred to as a MIL, is really a Milliradian or an angle equal to 1 radian/1000.

[ 12-25-2003: Message edited by: DMCI ]