Join 70,000 Long Range Hunting members.Please register for FREE to get full access.

 Long Range Hunting Online Magazine sectional density's effect on bullet performance
 User Name Remember Me? Password
 Home LRH Store Forums Long Range Rifles Articles Reviews Video G7 Ballistics Calculator Rules & FAQ Register Search Today's Posts Mark Forums Read

# sectional density's effect on bullet performance

#1
08-02-2003, 03:08 AM
 Platinum Member Join Date: Feb 2003 Location: Pueblo, CO Posts: 1,153
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??
#2
08-02-2003, 08:59 AM
 Platinum Member Join Date: May 2001 Posts: 2,377
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
#3
08-02-2003, 01:02 PM
 Silver Member Join Date: Sep 2001 Posts: 263
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.
#4
08-03-2003, 02:07 AM
 Platinum Member Join Date: Feb 2003 Location: Pueblo, CO Posts: 1,153
Re: sectional density\'s effect on bullet performance

Thks. guys

 Bookmarks

 Thread Tools Display Modes Linear Mode

 Similar Threads for: sectional density's effect on bullet performance Thread Thread Starter Forum Replies Last Post Len Backus Rifles, Bullets, Barrels and Ballistics 8 09-16-2011 11:50 AM Dannyd Rifles, Bullets, Barrels and Ballistics 11 04-28-2010 08:48 PM hjl Rifles, Bullets, Barrels and Ballistics 9 06-29-2006 04:07 PM JDT The Basics, Starting Out 12 01-19-2006 03:21 PM kmassaro Long Range Hunting & Shooting 0 10-06-2004 10:54 PM

 Current Poll Do you wear hearing protection while hunting? Usually do Usually do not No but I probably will in future
 Current Poll - 2 Do you have a high speed Internet connection? Yes, DSL, satellite, wireless or something else. - 89.18% No, only dialup right now. - 10.82% Total Votes: 3,049You may not vote on this poll.

All times are GMT -5. The time now is 03:25 PM.

 Contact Us - Long Range Hunting Online Magazine - Privacy Statement - Terms of Service - Top