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This Sectional Density thing

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Unread 06-09-2014, 12:31 PM
Gold Member
Join Date: Mar 2011
Location: Reno, Nevada
Posts: 971
This Sectional Density thing

Could someone explain to me the concept of Sectional Density...............I see that the 6.5 have a lot higher SD than most 308 bullets

Whats the advantage to shooting bullets with a high SD I would think that the weight of the bullet would matter more.................................

A 6.5 140 has a really high SD higher than some bullets that are a lot heavier I would think that the bullet mass and weight would make up for its lack of SD
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Unread 06-09-2014, 04:39 PM
Platinum Member
Join Date: Jul 2012
Location: North Central Valley California
Posts: 1,526
Re: This Sectional Density thing

I believe Chuck Hawks explains it pretty well ...

Sectional Density

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Hunter Safety Instructor - California Hunter Safety Meritorious Service 1971 - 1972. Rifle/Pistol Marksmanship Instructor - NRA Life Member

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Unread 06-09-2014, 05:36 PM
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Join Date: Apr 2011
Posts: 42
Re: This Sectional Density thing

The sectional density of the bullet is a part or the formula used to calculate the bullets B.C. / ballistc coefficients. Something like the ratio of the bullets sectional density to its form factor
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