Garmin Tactix Delta Owner's Manual page 40

TIP: When you use one of the Applied Ballistics custom drag curves, the ballistic coefficient will display a
value of 1.000.
Bullet Diameter: The bullet diameter measured in inches. Input field.
NOTE: The diameter of the bullet may vary from the common name of the round. For example, a 300 Win
Mag is actually .308 inches in diameter.
Bullet Length: The length of the bullet measured in inches. Input field.
Bullet Weight: The bullet weight measured in grains. Input field.
Drag Curve: The Applied Ballistics custom drag curve, or the G1 or G7 standard projectile models. Input field.
NOTE: Most long range rifle bullets are closer to the G7 standard.
Profile Fields, Gun Properties
Muzzle Velocity: The speed of the bullet as it leaves the muzzle. Input field.
NOTE: This field is required for accurate calculations by the shooting solution. If you calibrate the muzzle
velocity, this field may be updated automatically for a more accurate firing solution.
Output Units: The output units of measure. A milliradian (mil) is 3.438 inches at 100 yards. A minute of angle
(MOA) is 1.047 inches at 100 yards.
Sight Height: The distance from the center axis of the rifle barrel to the center axis of the scope. Input field.
TIP: You can easily determine this value by measuring from the top of the bolt to the center of the windage
turret, and adding half of the diameter of the bolt.
SSF - Elevation: A linear multiplier that accounts for vertical scaling. Not all rifle scopes track perfectly, so the
ballistics solution requires a correction to scale according to a particular rifle scope. For example, if a turret is
moved 10 mil but the impact is 9 mil, the sight scale is 0.9. Input field.
SSF - Windage: A linear multiplier that accounts for horizontal scaling. Not all rifle scopes track perfectly, so the
ballistics solution requires a correction to scale according to a particular rifle scope. For example, if a turret is
moved 10 mil but the impact is 9 mil, the sight scale is 0.9. Input field.
Twist Rate: The distance it takes for the rifling of your barrel to make one full rotation. Rifle twist is often
provided by the gun or barrel manufacturer. Input field.
Zero Height: An optional modification to impact elevation at zero range. This is often used when adding a
suppressor or using a subsonic load. For example, if you add a suppressor and your bullet impacts the target
1 inch higher than expected, your Zero Height is 1 inch. You must set this to zero when you remove the
suppressor. Input field.
Zero Offset: An optional modification to impact windage at zero range. This is often used when adding a
suppressor or using a subsonic load. For example, if you add a suppressor and your bullet impacts the target
1 inch to the left of the expected impact, your Zero Offset is -1 inch. You must set this to zero when you
remove the suppressor. Input field.
Zero Range: The range at which the rifle was zeroed. Input field.
Profile Fields, Gun Properties, Calibrate Muzzle Velocity
Range: The distance from the muzzle to the target. Input field.
TIP: You should enter a value as close as possible to the range suggested in the shooting solution. This is the
range where the bullet slows to Mach 1.2 and begins to enter the transonic range.
True Drop: The actual distance the bullet falls while in flight to the target, displayed in milliradians (mil) or
minute of angle (MOA). Input field.
Profile Fields, Gun Properties, Calibrate Drop Scale Factor
Range: The range from which you are shooting. Input field.
TIP: This range should be within 90% of the recommended range suggested in the shooting solution. Values
that are less than 80% of the recommended range will not provide a valid adjustment.
True Drop: The actual distance the bullet falls when fired at a specific range, displayed in milliradians (mil) or
minute of angle (MOA). Input field.
32 Applied Ballistics
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