USPSA Handgun Competition Rules January 2008

APPENDIX C2
Match Chronograph and Equipment Set-up
Chronograph(s):
1. The chronograph(s) must be shielded from the effects of changing sunlight.
Setting the chronograph(s) in the shade of a tree, or under a cover which
allows a differing amount of sunlight to touch any part of the skyscreens or
skyscreen brackets is prohibited. The recommended method for outdoor
locations is to use an enclosed “chrono box”. In all locations, the use of
either infrared sensors or incandescent lighting provides the most consistent,
repeatable results.
2. Two chronographs should be used when possible and set up in tandem so
both units measure each shot fired.
3. In all cases, the skyscreens must be positioned and spaced per the manufacturer’s
requirements for the chronograph in use. The closest skyscreen must
be placed no less than 10 feet from the shooting location.
4. When possible, the chronograph(s) should be run on AC power. If using
generator power, the chronograph readings must be monitored for consistency.
If using battery power, the battery must be changed or recharged as
necessary to insure consistent results.
5. Failing these conditions, or in the absence of a chronograph, the match must
use each competitor’s declared Power Factor for match scoring.
Scale(s):
6. Scales must be shielded from the wind to prevent errors in measurement
while weighing competitor bullets.
7. Two scales are recommended when available, weighing each bullet tested
on both scales.
8. Whenever possible, the scale(s) should be run on AC power. If using generator
power, the scale readings must be monitored for consistency. If using
battery power, the batteries must be changed or recharged as necessary to
insure consistent results
9. A set of appropriate check weights must be used in calibrating the scale(s).
10. Failing these conditions, or if a scale is not available, each competitor’s
declared bullet weight must be used.
Bullet Puller(s):
11. Bullet pullers must be of a design which will not damage the bullet or
change its weight.
12. If a bullet puller is not available or breaks and a replacement is not available,
the declared bullet weight must be used for all subsequent competitors.
USPSA Handgun Rules, January 2008 Edition • 65