Handbook info question

youngsparkey

January 14, 2007 05:29

I'm just getting started in reloading. I bought the Lyman 48 edition Reloading Handbook. I also picked up a couple of the caliber specific books. In the info what does BC: .### mean?

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  JustC

  January 14, 2007 05:42

  Balistic Coefficient. Simply put, a calculation that takes into account a bullets length and shape as well as weight and a given muzzle velocity which will result in a number that gives an approximation of the bullets ability to overcome wind and gravity in flight.
  
  The higher the BC number, the more aerodynamic and the greater it will resist environmental changes during flight.
  
  This is a very basic explanation,..you should really do a search on BC and read some of the better written articles on the subject. You will be using the BC number should you start any shooting in the intermediate to long range distances.

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  perry shooter

  January 14, 2007 05:45

  Hello Ballistic Coefficient or how streamline the bullet is

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  nononsense

  January 14, 2007 05:48

  youngsparkey,
  
  It stands for Ballistic Coefficient:
  
  The ballistic coefficient (BC) of a projectile is a measure of its ability to overcome air resistance in flight. The higher the BC, the better or more efficiently it moves through the air.
  
  Discussion:
  
  http://www.loadammo.com/Topics/September01.htm
  
  BC calculator:
  
  http://www.uslink.net/~tom1/calcbc/calcbc.htm
  
  Best.

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  youngsparkey

  January 14, 2007 06:40

  thank you guys very much. I wont be needing that for a little while.

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  lfi guy

  January 17, 2007 17:27

  quote:Originally posted by JustC
  Balistic Coefficient. Simply put, a calculation that takes into account a bullets length and shape as well as weight and a given muzzle velocity which will result in a number that gives an approximation of the bullets ability to overcome wind and gravity in flight.
  
  The higher the BC number, the more aerodynamic and the greater it will resist environmental changes during flight.
  
  This is a very basic explanation,..you should really do a search on BC and read some of the better written articles on the subject. You will be using the BC number should you start any shooting in the intermediate to long range distances.
  
  
  Get the Sierra manuals, too. They have the best discussion on the subject. I rely on the Sierra more than my RCBS or Hodgdon maunals.
  t

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