Bushnell 20-4124EU manual Calculating Holds for Wind and Moving Targets, Maintenance

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 1.33 yards. The fencepost measures 2.5 mils in your reticle.

1.33 yards x 1000		1330
	=	=	532 Yards
2.5 mils		2.5

Since this is a variable power scope and the reticle stays the same size no matter the magnification, it must be set at the 12x 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 100 to 600 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)
100 Yards	3.6”	(0.1 Yard)
200 Yards	7.2”	(0.2 Yard)
300 Yards	10.8”	(0.3 Yard)
400 Yards	14.4”	(0.4 Yard)
500 Yards	18.0”	(0.5 Yard)
600 Yards	21.6” (0.6 Yard)

1.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.

2.6x - Object measures half as large as 12x, so calculate the distance, then divide by half.

3.12x - 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.

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