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'''B.C.''' literally means "before Christ" and is the dating mechanism used for older dates in human history. However, due to a miscalculation, the calendar start time does not correspond to the exact year of [[Jesus]]' birth, which actually occurred a few years earlier.
'''B.C.''' literally means "before Christ" and is the dating mechanism used for older dates in human history. However, due to a miscalculation, the calendar start time does not correspond to the exact year of [[Jesus]]' birth, which actually occurred a few years earlier.
==Firearms==
* In [[Glossary of Firearms and Second Amendment Terms|firearms terminology]], B.C. refers to [[ballistic coefficient]]. According to [[:Category:Gun Writers|gun writer]] Matthew Boyd, ballistic coefficient is "the [[ratio]] of a [[bullet]]'s [[sectional density]] to its [[coefficient]] of form. BC represents how efficiently the bullet flies through the air; the higher the BC number the more [[aerodynamic]] the bullet."<ref>Boyd, Matthew J., "[http://www.chuckhawks.com/firearms_terminology.htm Basic Firearms Terminology Defined]." [[Guns and Shooting Online]] - [[Chuck Hawks]].com, 2012. Accessed February 19, 2015</ref>
*[[Anno Mundi]]
*[[Anno Mundi]]
[[Category:Dating Systems]]
[[Category : Dating Systems]]
[[Category : Firearms Glossary]]
[[Category : Ammunition]]