Infinity is an exterior ballistics program for small arms. Infinity
Suite includes the Infinity exterior ballistics program, additional
Reloading Data programs to calculate all the cartridge and reloading
data included in the 5th Edition printed manuals, and the Reference
materials from the 5th Edition printed manuals. Infinity is the
fifth version of the Sierra Bullets exterior ballistics program.
We believe you will find this to be the most complete and user
friendly ballistics program available. This software program computes
all essential elements of the trajectory, in 1 yard (or meter)
increments, of any bullet that has a Ballistic Coefficient referenced
to the "G1" drag function, and for any set of firing
conditions. These firing conditions include muzzle velocity of
the bullet, elevation (or depression) angle of the gun barrel,
altitude of the firing point, wind conditions at that location,
and weather (meteorological) conditions at the firing time. The
trajectory parameters calculated by the program include velocity,
energy, momentum, drop relative to the extended bore line of the
gun, bullet path height relative to the line of sight of the shooter,
wind deflection of the bullet, and time of flight of the bullet.
All are computed versus distance from the muzzle as the bullet
flies downrange. The program outputs a list of all these parameters
and provides graphs, which the user can select, of velocity, energy,
drop, bullet path height, and crosswind drift.
The program does much more than compute bullet trajectories.
It contains a feature that computes the effects on the bullet trajectory
of variations in firing conditions. For example, you can change
altitude of the firing point, and compute the effect on the trajectory.
Or you can change a wind condition; or muzzle velocity; or Ballistic
Coefficient. In fact, you can change any inputted firing condition
or combination of conditions. You can also graph the trajectory
variations that result.
Another key feature of the program is that it will
calculate the point blank range of a cartridge for a game animal
or silhouette target of any size (up to a vital zone of 30 inches
(762cm)), for either of two cases. The first case is when you have
already sighted in your gun for a certain zero range and you want
to know how far out you can shoot at the animal or silhouette without
holding high to compensate for the drop of the bullet. In the second
case the program will tell you where to set your zero range in order
to maximize the point blank range.
The program also will tell you what happens when
you first zero your gun in at a convenient shooting range, and then
shoot at a target that is either uphill or downhill compared to
the slope of the shooting range where you sighted in. In such a
situation the bullet trajectory will be different compared to the
trajectory at the range you used to zero in. The program calculates
the differences in all the trajectory parameters for you.
Another feature of the program will compute where
your gun is zeroed if you know that it shoots high by a measured
amount at a known range.
Still another feature calculates the maximum range
that a bullet can reach along a given slope angle. The slope angle
can be chosen as positive (uphill), zero (level fire), or negative
(downhill). This feature also calculates the elevation angle of
the gun muzzle (referenced to level) for the bullet to reach the
maximum range along the chosen slope.
The program will also compute the maximum altitude
a bullet can reach, above a given firing point.
Infinity handles up to five different active bullets
at a time. The program stores a full inventory of bullets and cartridges
offered by 15 manufacturers, both U. S. and foreign. Each of the
five active bullets can be selected from anywhere in the stored
inventory list. A key feature of the program allows any one of several
trajectory parameters to be compared among the five (or any smaller
number) bullets that you select. You can compare remaining velocity,
energy, drop, bullet path height, or crosswind drift. Both a list
and a graph of these comparisons are provided by the program.
You can also create custom bullets and save the
settings in the custom bullet database. These custom settings function
in the program the same way as the manufacturers bullets. You can
save a modification of an existing bullet or create a custom bullet
from scratch. The custom bullets database is handled separately
from the manufacturer's database allowing future updates of the
manufacturer's data without affecting your custom settings. For
more information see Custom Bullets.