"Results in the table show that manufacturer claims regarding bullet BC often are exaggerated.This exaggeration leads to inaccurate predictions of bullet drop,wind drift and impact energy."
The example they give to explain their charts reads:
"An example demonstrates the implications of an inaccurate BC for the Berger 115 grain VLD shot at 3148 fps.For a zero range of 200 yds and a 10mph crosswind,using the BC of 0.523 gives a drop of 45.1 inches,a wind drift of 19.6 inches,and an impact energy of 1,180 ft-lbs at 550 yds for atmospheric conditions of 30 degrees F,zero percent relative humidity,and 29.92 millimeters of mercury.In contrast,using the more accurate BC of 0.419 gives a drop of 49.8 inches,a wind drift of 25.7 inches,and an impact energy of 956 ft-lbs under the same conditions."
They end by stating:
"In conclusion,under realistic field conditions,BCs can depart significantly from manufacturers published values,some by nearly 25 percent.Bullets also exhibit shot to shot variations of 1-5 percent in BC that suggest an inherent accuracy limit in predictions based on BC measurements.It should be noted that the BC can depend on the muzzle velocity and on the particular firearm used.If a BC is needed with less than 5 percent uncertainty,the BC should be determined with the same firearm."
Wow
,worth reading and thinking about by everyone who shoots-and certainly if you shoot long range.' Be Careful ' out there.Good hunting!
