Correcting for Environmental Factors Flashcards
What is the most important variable affecting flight of a bullet?
Air resistance
What are the five factors of Air Resistance?
Altitude Barometric (station) Pressure Temperature Humidity Wind
An increase in altitude will (raise or lower) a bullet’s point of impact (POI)?
Raise
An increase in barometric pressure will (raise or lower) a bullet’s point of impact (POI)?
Lower
An increase in temperature will (raise or lower) a bullet’s point of impact (POI)?
Raise
A decrease in Humidity will (raise or lower) a bullet’s point of impact (POI)?
Lower
What three factors are included in calculating Density Altitude (DA)?
Temperature
Barometric Pressure
Relative Humidity
What are the Density Altitude (DA) measurements for sea-level conditions?
Temperature = 59 degrees
Barometric Pressure = 29.92
Humidity = 50 percent
What three factors must be determined BEFORE any wind call is made?
Wind direction
Wind speed (in MPH)
Wind vs. Caliber
Wind call:
Wind is shown by smoke and dust, but not by a flag
1-3mph
Wind call:
Leaves and small twigs in trees are in constant motion
5-8mph
Wind call:
Wind is felt on face; grass begins to move and leaves in trees rustle
3-5mph
Wind call:
Small trees begin to sway
12-15mph
Wind call:
Dust/loose paper are raised; small branches in trees begin to move
8-12mph
True or false:
Wind cosines are not used when reading mirage
True
