Changes

<!-- NOTE to Editors: We request that you please DO NOT change or remove ANYTHING in the [[Second Amendment]]-[[Gun rights]]-related Template links preceded with "{{", such as {{Template:Firearms_topics}} or {{Template:Firearms SAMMI glossary quotation}}. Thank you. -->'''Sectional density''' (SD) is a [[Glossary of Firearms and Second Amendment Terms|firearms term]] related to [[ammunition]]. According to [[:Category:Gun Writers|gun writer]] Matthew Boyd, sectional [[density]] is "the [[diameter]] to weight [[ratio]] of a [[bullet]]. Calculated by dividing the bullet's weight in [[pound]]s by its [[diameter]] in inches. Sectional density is important because, all other factors being equal, the higher the SD the better the [[penetration]] of 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>

<!-- NOTE to Editors: We request that you please DO NOT change or remove ANYTHING in the [[Second Amendment]]-[[Gun rights]]-related Template links preceded with "{{", such as {{Template:Firearms_topics}} or {{Template:Firearms SAMMI glossary quotation}}. Thank you. -->'''Sectional density''' (SD) is a [[Glossary of Firearms and Second Amendment Terms|firearms term]] related to [[ammunition]]. According to [[:Category:Gun Writers|gun writer]] Matthew Boyd, sectional [[density]] is "the [[diameter]] to weight [[ratio]] of a [[bullet]]. Calculated by dividing the bullet's weight in [[pound]]s by its [[diameter]] in inches. Sectional density is important because, all other factors being equal, the higher the SD the better the [[penetration]] of 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>

==Bibliography - Further Reading==

==Bibliography - Further Reading==

<references/>

<references/>

{{Template:Ammunition topics}}

{{Ammunition topics}}

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{{Template:Firearms topics}}

{{Firearms topics}}

[[Category : Handloading]]  

[[Category:Handloading]]  

[[Category : Ammunition‎]]

[[Category:Ammunition‎]]

[[Category : Firearms Glossary]]

[[Category:Firearms Glossary]]

[[Category : Firearms]]

[[Category:Firearms]]

[[Category : Engineering]]

[[Category:Engineering]]