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The following information was given to Tom S. Miller by Mr. Skip Talbot, FCSA consultant, regarding the ballistics of the .50 BMG cartridge. This information reprinted with permission from Sierra Bullets Infinity Exterior Ballistics Software. Copyright 1999 Sierra Bullets LLC All Rights Reserved.
Atmospheric Conditions
Humidity=50%
Temperature=45 degrees Fahrenheit
Wind Velocity=1 mph @ 3:00 (full value wind)
Elevation=5000 feet above sea level
Cartridge
.50 BMG
800 grain LRS solid projectile (Similar to Barnes 800 grain borerider)>
ballistic coefficient=1.095
muzzle velocity=2650 fps
rifle zeroed @ 200 yards
@ 1000 yards
velocity=2015 fps
energy=7200 ft. lbs.
drop=236 inches
wind drift=2.93 inches
time of flight=1.298 seconds
@1750 yards
velocity=1630 fps
energy=4720 ft. lbs.
drop=892 inches
wind drift=9.39 inches
time of flight=2.458 seconds
@2000 yards
velocity=1482 fps
energy=3900 ft. lbs.
drop=1355 inches
wind drift=13.6 inches
time of flight=3.037 seconds
@2500 yards
velocity=1266 fps
energy=2849 ft. lbs.
drop=2460 inches
wind drift=23 inches
time of flight=4.135 seconds
@2800 yards
velocity=1159 fps (projectile becomes sub-sonic)
energy=2387 ft. lbs.
drop=3375 inches
wind drift=30.15 inches
time of flight=4.88 seconds
Information about the Velocity of Sound at different air temperatures
32 degrees F.=1088 fps
68 degrees F.=1129 fps
212 degrees F.=1266 fps
932 degrees F.=1814 fps
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