IMPACT
®
4000
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In general, G1 is better for flat-based bullets typically
used with pistols and muzzleloaders. G7 is more
common and better for longer, boat-tailed bullets
which are common for center fire cartridges.
VS
G-7G-1
Note: Drag Model options: Multi G1, Multi G7 or CD, can be
imported from the GeoBallistics
®
App. When using these the
ballistic coefficient will read “MULTI” or “CD” and the Drag
Model will read “MULTI G1”, “MULTI G7” or “CD” based on
your selection.
Rifle Information
To edit the Rifle information, toggle to and select
“Rifle”. To edit a field, when highlighted, press the
“Right Arrow” button to select the data and use the up
and down arrows to modify the data.
Bullet Information Screen
To edit the Bullet information, use the up and down
arrows to toggle to and select “Bullet”. To edit a field,
when highlighted, press the “Right Arrow” button
to select the data and use the up and down arrows
to modify the data. Press the “Left Arrow” button to
return to the field list. Return to the previous screen to
continue to the Rifle information.
Caliber (in):
The bullet’s diameter in inches.
Weight (gr):
The bullet’s weight in grains.
Length (in):
The bullet’s length in inches.
Ballistic Coefficient:
The bullet’s ballistic coefficient as it correlates to
the drag function.
Note: Find these values on the ammunition’s box or on the
manufacturer’s website.
Drag Model – G1 vs G7
This information may be printed on the box if you are
using manufactured bullets. If you are using custom
loads, use the Drag Model listed on the packaging
for your bullet. If the Drag Model is not listed on the
packaging, this information can usually be found on
the bullet/ammo manufacturer’s website.
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