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RETICLE SUBTENSIONS
The TSSR2 SFP MIL reticle is based on the milliradian, usually
shortened to mrad or MIL. A “MIL” is dened as “one thousandth”,
or 1/1000. A MIL is 1/1000 of a radian ( a unit of angular measure-
ment). Since there are 6.2832 radians in a circle, and each radian is
chopped up into a thousand pieces, there are 6.2832 x 1000 = 6,283.2
MIL in a circle. Since there are 360 degree in a circle, we can get
360 degree/6,283.2 MIL=0.573 degree/MIL. If the target is 100 yards
( 3600 inches) away, we can use 3600 Tan (.0573 degree) to get 3.6
inches which means 1 MIL equals to 3.6 inches at 100 yards.
NOTE: The crosses and the foot marks (see page 6) with numbers
between them are the quick ranging guides. Those guides are
uniquely calibrated so they represent the same dimensions at
different distances. The number below the cross represents the
yardage in hundreds. You can simply t check the guides against a
known size target. Once you identied a t just read out the number
below the cross in hundred yards, which are the distances between
you and the target.
UNIT A1 B1 B2 B3 B4 C1 C2 C3 C4 C5
Subtensions in MIL
0.028 0.4 0.2 0.15 0.2 1 0.1 0.2 0.5 1
in @ 1000 yds
0.1 1.44 0.72 0.54 0.72 3.6 0.36 0.72 1.8 3.6
NOTE: The reticle is 1 MIL below the virtual center line.