Sightron Riflescopes - Manual (Page 9)

Target can also be calculated if the distance is known.
In addition to actingas a rangefinder, the mil-dot reticle
can also be used to hold off horizontally for wind cor-
rection or vertically to compensate for bullet drop at
longer distances.
Milliradian usage is not complicated, though it may
seem so at first. Basically, one “mil” equals 1 unit at
1000 units of distance. So a 1” object will occupy 1 mil
of space on the reticle when it is 1000 inches away.
3.6” at 3600 inches (100 yards)
{
1 foot at 1000 feet
1 “mil”=
1 yards at 1000 yards
1 meter at 1000 meters
For those thinking in terms of Minute-of-Angle (MOA),
1 mil = 3.438 MOA.
While using a scope with a mil-dot reticle to view a tar-
get, the shooter determines the amount of space the
oblect covers on the reticle. It is necessary to determine
that space to at least 0.1 mil accuracy, or preferably to
the 0.05 mil. For instance, if a 30” object covers 1.15
mils when viewed through the scope, some shooters
may see this as 1.1 mils or 1.2 mils. This will lead to a
clockwise position. Place the new battery with posi-
tive(+) side up. Rotate the cap clockwise to tighten.
Note: Only a snug fit is required. Do not over tighten.
Re-Zeroing Your Scope
All Sightron SII Big Sky Series and and all Sightron
model Target Scopes are re-settable to zero after sight-
ing in your scope.
1. To re-zero all Target Models loosen the Allen screw(s)
and remove the knob by pulling up. Then align the
zero mark on the knob with the index line on the
Revolution scale underneath. Retighten the Allen
screw(s).
2. On all SII BIG Sky Series without Target knobs sim-
ply pull up on the adjustment dial and rotate the dial to
zero then push down.
Using Your Mil-Dot Scope
A “mil” or milliradian is a unit of angular measure-
ment similar to a degree, or Minute-of-Angle (MOA =
1/60th of a degree). In a complete circle, there are 360
degrees, 21,600 MOA or 6,283.2 mils. A mil-dot reticle
uses the angle measured by a milliradian to calculate
the range to an object when the target size is known.
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