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sectional density's effect on bullet performance

 
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  #1  
Old 08-02-2003, 02:08 AM
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sectional density\'s effect on bullet performance

I know that it is interrelated with B.C., but I'm not sure what the difference is, and it's application to LR??
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Old 08-02-2003, 07:59 AM
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Re: sectional density\'s effect on bullet performance

Me neither but here's some stuff I found.


Relationship to BC:
http://ffden-2.phys.uaf.edu/212fall2...ges/BCcalc.htm

Someone else's paper:
http://ffden-2.phys.uaf.edu/212fall2...ges/BCcalc.htm

From Sierra:
http://www.sierrabullets.com/xring/i...action=Vol7no3

Lots of stuff:
http://www.exteriorballistics.com/ebexplained/index.cfm
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Old 08-02-2003, 12:02 PM
MAX MAX is offline
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Re: sectional density\'s effect on bullet performance

sscoyote, SD or sectional density is a measure of mass to cross section of a projectile. For a given caliber, higher SD means greater penetration IF ALL OTHER THINGS ARE EQUAL.

SD is used to calculate ballistic coefficient(BC). BC is a measure of how well a projectile retains velocity in comparison to a standard projectile. Any number less than 1 means it retains less velocity at a given range, 1 is equal, and more than 1 denotes more retained velocity. Another way of looking at it is that it reflects a bullet's drag characteristics.

In calculating BC, the bullet's FORM is considered in relation to SD, which presents a NON-DIMENSIONAL value for comparison. BC for a given form is directly proportional to SD.

Try "Understanding Firearm Ballistics" by Robert Rinker. It is a cheap and time saving education, which cover interior/exterior and terminal ballistics. Luck.
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  #4  
Old 08-03-2003, 01:07 AM
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Re: sectional density\'s effect on bullet performance

Thks. guys
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