Step 1
Shooters Basic Info
Please determine the following basic data prior to using this system:
1.) Rifle caliber you intend to use: ______________________
2.) Bullet Shape _____, Bullet Weight _____, Muzzle Velocity _____
Note:
The Muzzle Velocity of various cartridges by bullet shape and configuration
are available from the manufacturer, or you may refer to specific
Ammunition Reloading Tables. This data
is necessary for you to properly determine your bullet's "Factor"
number. This is an easily determined
number that eliminates the confusion of ballistic coefficients, etc.This factor
number is necessary to determine a particular rifle's zero requirements
specific to the cartridge you have selected and the appropriate "TDS
Factor Decal" you will refer to when using the TDS Tri-Factor Reticle
system.
A selection of (11) TDS Tri-Factor Reticle decals are provided with the Kahles
scope you have purchased.
3.) What is the Game you intend to hunt? _________________________
How do we determine a TDS "Factor"?
An important component of this unique aiming system is the TDS "Factor"
reference number such as 6 or 7.4... This is a simple reference number.
To determine the TDS Factor , a shooter must first zero their rifle at 200
yards to hit exactly in the center of the target. Next, shoot a group at
300 yards and then measure the bullet drop. This drop in the bullet's point
of impact at 300 yards, measured in inches, becomes the "FACTOR"
for
that particular rifle, caliber and the particular bullet you have selected.
This procedure may not be required however... Please refer to the table on
the last page of this brochure... A selection of some of the more
popular rifle calibers, various bullet types, muzzle velocities, and their
corresponding "Factor Numbers", have been computed. You may also
refer
to any manufacturer's published Ammunition Ballistic Tables.
Further...
Since various bullets will scribe different arcs in flight, it is necessary
to adjust the shooter's viewing alignment through the reticle of the rifle
scope
so that the bullet's flight path and the shooter's aiming point are properly
aligned with the intended point of impact on a target at a given distance.
The TDS Tri-Factor number, and the design of the four Range Marker Bars (RMB)
of this unique TDS Tri-Factor Reticle system, will enable you
to quickly adjust your alignment and assist you in making precision shots
at extended distances, while compensating for a crosswind component.
Please refer to Fig. A, TDS Tri-Factor Reticle components.
TDS Tri-Factor Reticle Components
Note:
For maximum accuracy with the Kahles riflescope, it will be important to select
9X power setting when making a shot. This is due to the fact
that the reticle in this particular scope is mounted in the second image focal
plane. Accuracy may further be insured by sighting in your rifle at a
yardage distance that is equal to the distance indicated on the third marker
bar of the TDS reticle decal* for the particular caliber and bullet you
choose to use. Example: if the TDS reticle decal for your selected ammunition
has a factor of 5.8 to 6.4, you will note that the distance listed next to
the third marker bar is 500 yards. In this case, one should attempt to sight
at 500 yards. If this is not possible, try to sight in as far out as range
limitations permit. *See the section regarding the TDS Tri-Factor Reticle
decal.