Bushnell NITRO Guia Del Propietario página 10

RANGING WITH YOUR MIL-DOT RETICLE
The mil is an angular measurement -- 1/6400th of a circle -- which equals almost precisely one yard at 1000 yards, or one
meter at 1000 meters. This proportional relationship makes possible a simple formula to compute distances:
The Measured Object's Width or Height in Yards x 1000
Object's Width or Height in Mils
This formula works equally well with meters, but don't mix meters and yards: Measure the object in yards to find the
distance in yards, use meters to yield distances in meters.
Looking through your scope, select an object at the distance you want to range -- an object whose width or height you
know or can estimate accurately. Man-made objects of uniform size, such as fenceposts, are best, but any object of known
dimensions will do. Measure the object's height or width carefully in mils, compute it according to the formula and you
will find its range. Support your rifle and be precise when measuring objects; any measuring error causes an error in the
computed range. Equally, a mistake in estimating the object size results in a proportional range error.
Here's an example: A coyote is sunning himself in a snowfield beside a fencepost; having crossed the fence earlier, you
know that the post is about four feet high, or 1.33 yards. The fencepost measures 2.5 mils in your reticle.
1.33 yards x 1000
2.5 Mils
ALTITUDE AND TEMPERATURE
Ballistic charts published by ammunition manufacturers are based upon standard sea level conditions. When sighting in,
it is well to keep in mind that altitude and temperature affect trajectory. It is best to sight-in under the same conditions in
which you will be hunting.
DO YOU NEED TO SEND YOUR SCOPE TO US?
Before returning your scope for service, you should check the following points to make sure the problem is with the scope:
• Check the mounting system and rings for looseness or misalignment.
• Check to be sure the barrel and action are properly bedded and all receiver screws are tight.
• Check to be sure the mounting system allows sufficient clearance between the objective bell and the barrel.
• Check to be sure you are using the same type and weight ammunition that you used for sighting-in.
10
1330
= = 532 Yards
2.5
= Range in Yards