Pact MKIV XP User Manual page 11

Automatic Power Factoring (APF):
With CHRONO COMMAND displayed on the screen push the PAR button. The timer will ask you
to " ENTER BULLET WEIGHT AND PUSH SET ". Push 2, 0, 0 , SET . Now press the GO button and
chronograph a shot.
ES 105.9 FPS
AVRG 763.8 FPS
Remember that the power factor for the individual shot is displayed, not the average.
4 Ballistic Computer
The Ballistic Calculator is so easy to use that you really don't need much explanation. It does
however, have some trick features that may not be apparent on the first pass.
Use Chrono Data:
From " TIMER COMMAND " press TRAJ . The first thing the Ballistic Computer needs to know is
the velocity to base the calculation on. If you're shooting at the range it will pick up the current
average velocity (which you can override) from the chronograph. If none is present in memory it
will default to 2500.0 FPS .
Enter a Velocity Manually:
If you want to change the default , stay away from the SET key and first tell the machine what it
needs to know. For example, if you want the machine to use "2650 FPS" for its calculation just
type " 2650 ". If you make a mistake entering a number just use the back arrow key then GO to
erase it. When the number entered is ok with you hit SET and the Ballistic Calculator will accept it
and move to the next screen.
(TRAJ)
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