Data Input
The key data required to
get your numbers is in the dark bordered fields. If you still see # signs
in your trajectory data then make sure you haven't neglected to fill one of
these fields. Real World data input allows you to shoot your own numbers and
input them for comparison against your computed data. This is a good way to
check yourself against your ral world findings to make sure you don't have
an invalid scope height, VRF, muzzle velocity, etc. Once you have all of your
data input, saving the file to your hard drive will give you a snap shot of
all the relevant data for that rifle and scope combination.
Trajectory Data
This chart is in view while
you are editing the Data input so that you can see immediate results of your
variable and constant changes. The Hunter Hold columns show you the optimal
zero for your scope on this chart as well as the minimum hold needed to maintain
your Hunter Hold Minimum.
Trajectory Graph
Calculated drop is poltted in blue while your individual Real World numbers are plotted as red dots. If the red dots don't follow your calculated trajectory, it's time to recheck your data input for errors.
Click & Hold Charts
With all of your pertinent
data on one side and your click chart on the other, just fold this page in
half after outputting onto heavy paper and then laminate it at a local Kinko's.
You now have both a Field Target and a Hunter Class Field Target Click or
Hold Chart to use when you shoot. There is also another page that provides
you with a column of numbers that, when saved to a text file on your hard
drive, can then be imported into Eric Sander's Scopeknob program to build
a scope knob tape.
ScopeKnob Export
This page serves as little more than a holding place for your export data. Follow the instructions at the top of the page to creat a text file on your hard drive that can be imported into Eric Sander's ScopeKnob program.
Velocity Retention Factor Data
Dave Shames defined the
Velocity Retention Factor as "the ratio of the pellet's velocity at 10
yards to its velocity at the muzzle." The VRF are "experimentally
determined measures of the particular pellets' ability to retain velocity",
he further adds. Every rifle is a bit different so it's recommended that you
shoot your own VRF using your rifle and your pellets so that you have an accurate
representation for your rig. I have included a calculator so you just have
to put in your two velocities and there you go.
