Bushnell LASER 20-4124 - Manual (Page 12)

 
Looking through your scope at the synchronized magnification setting, 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 fence posts, 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, incorrectly 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 four feet high, or .33 yards. The fencepost measures .5 mils in
your reticle.
.33 yards x 000 330
= = 53 Yards
.5 mils .5
Since this is a variable power scope and the reticle stays the same size no matter the magnification, it must
be set at the x index dot to synchronize the mil-dot size for ranging.
CALCULATINg hOLDS FOR WIND AND MOVINg TARgETS
Your horizontal mil dots provide a precise way of holding for crosswinds and target movement. Just look
in your cartridge’s wind drift and moving target tables to determine the exact holds for different distances.
The accompanying table lists one-mil widths from 00 to 00 yards, so you can calculate how many mils
to hold right or left when firing in a crosswind, or engaging a moving target.
MIL WIDTh FOR WIND AND MOVINg TARgET LEADS
Distance One Mil at This Distance (Inches)
00 Yards 3.” (0. Yard)
00 Yards 7.” (0. Yard)
300 Yards 0.8” (0.3 Yard)
400 Yards 4.4” (0.4 Yard)
500 Yards 8.0” (0.5 Yard)
00 Yards .” (0. Yard)
. One mil is the distance between center of dots. It’s easy to measure in half-mils or even quarter-mils
but with practice you can measure tenths of a mil.
. x - Object measures half as large as x, so calculate the distance, then divide by half.
3. x - Synchronized setting for this mil-dot reticle. Calculate as normal.
MAINTENANCE
Your Bushnell ® YARDAGE PRO ® LASER RANGEFINDER RIFLESCOPE, though amazingly tough,
is a precision instrument that deserves reasonably cautious care.