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{{Infobox firearm cartridge
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{{infobox firearm cartridge
 
|name= .500 Linebaugh
 
|name= .500 Linebaugh
 
|image= [[File:.500 Linebaugh revolver variant.jpg|300px]]
 
|image= [[File:.500 Linebaugh revolver variant.jpg|300px]]
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The .500 Linebaugh cartridge was designed by John Linebaugh of Maryville, Mo. in 1986. John Linebaugh had been converting [[.45 Colt]] six-shooters to five-shot revolvers, thus offering a stronger cylinder which could withstand the firing of higher pressure .45 Colt ammunition. While this venture was successful, he continued to search for a more powerful cartridge which resulted in the .500 Linebaugh.<ref name="CartridgesoftheWorld11"/>
 
The .500 Linebaugh cartridge was designed by John Linebaugh of Maryville, Mo. in 1986. John Linebaugh had been converting [[.45 Colt]] six-shooters to five-shot revolvers, thus offering a stronger cylinder which could withstand the firing of higher pressure .45 Colt ammunition. While this venture was successful, he continued to search for a more powerful cartridge which resulted in the .500 Linebaugh.<ref name="CartridgesoftheWorld11"/>
   
The cartridge case itself was designed by cutting off the [[.348 Winchester]] case to {{convert|1.405|in|mm|abbr=on}}, turning the rim to a diameter of {{convert|.610|in|mm|abbr=on}} and opening the case mouth to accept a .510 caliber (12.9&nbsp;mm) bullet. The first revolvers converted to use the .500 Linebaugh were the Ruger Bisley and the Seville revolvers. Due to the demise of the Seville revolvers in the early 1990s all subsequent conversions have been carried out on revolvers based on the [[Ruger Bisley]] frame.<ref>{{cite web |url=http://www.gunblast.com/500Linebaugh.htm |title=The .500 Linebaugh |last1=Quinn |first1=Jeff |date=23 August 2004 |work=gunblast.com |publisher=Gunblast |accessdate=17 November 2010}}</ref>
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The cartridge case itself was designed by cutting off the [[.348 Winchester]] case to {{convert|1.405|in|mm|abbr=on}}, turning the rim to a diameter of {{convert|.610|in|mm|abbr=on}} and opening the case mouth to accept a .510 caliber (12.9 mm) bullet. The first revolvers converted to use the .500 Linebaugh were the Ruger Bisley and the Seville revolvers. Due to the demise of the Seville revolvers in the early 1990s all subsequent conversions have been carried out on revolvers based on the [[Ruger Bisley]] frame.<ref>{{cite web |url=http://www.gunblast.com/500Linebaugh.htm |title=The .500 Linebaugh |last1=Quinn |first1=Jeff |date=23 August 2004 |work=gunblast.com |publisher=Gunblast |accessdate=17 November 2010}}</ref>
   
 
It was when the supply of .348 Winchester cases started running out that John Linebaugh began working on the [[.475 Linebaugh]], which could be formed from the more available [[.45-70 Government]] cases. When the Winchester Model 1871 was reintroduced in the .348 Winchester, the ability to form .500 Linebaugh cases became again feasible.<ref name="CartridgesoftheWorld11"/> Today, Starline and Buffalo Bore offer .500 Linebaugh cases which are not dependent on the supply of .348 Winchester cases.
 
It was when the supply of .348 Winchester cases started running out that John Linebaugh began working on the [[.475 Linebaugh]], which could be formed from the more available [[.45-70 Government]] cases. When the Winchester Model 1871 was reintroduced in the .348 Winchester, the ability to form .500 Linebaugh cases became again feasible.<ref name="CartridgesoftheWorld11"/> Today, Starline and Buffalo Bore offer .500 Linebaugh cases which are not dependent on the supply of .348 Winchester cases.
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The .500 Linebaugh is a proprietary cartridge and thus has not been adopted by mainline firearms manufacturers. Currently no firearms manufacturers make revolvers specifically for this cartridge. Instead, gunsmiths such as John Linebaugh of Linebaugh Custom Six guns and Hamilton Bowen of Bowen Classic Arms convert pre-existing single action revolvers such as the Ruger Blackhawk and Bisley to fire the cartridge. Hamilton Bowen has been known to have converted the Ruger Redhawk double action revolver for use with this cartridge.
 
The .500 Linebaugh is a proprietary cartridge and thus has not been adopted by mainline firearms manufacturers. Currently no firearms manufacturers make revolvers specifically for this cartridge. Instead, gunsmiths such as John Linebaugh of Linebaugh Custom Six guns and Hamilton Bowen of Bowen Classic Arms convert pre-existing single action revolvers such as the Ruger Blackhawk and Bisley to fire the cartridge. Hamilton Bowen has been known to have converted the Ruger Redhawk double action revolver for use with this cartridge.
   
:[[File:500Linebaugh01.png|400px|alt=.500 Linebaugh Cartridge Schematic|.500 Linebaugh SAAMI cartridge dimensions - all dimensions in inches (mm)]]
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:[[Image:500Linebaugh01.png|400px|alt=.500 Linebaugh Cartridge Schematic|.500 Linebaugh SAAMI cartridge dimensions - all dimensions in inches (mm)]]
   
 
Due to the proprietary status of the cartridge neither the CIP nor SAAMI have published official specifications for the cartridge. As is the case, there can be some variations from gunsmith the gunsmith. No pressure standard has been published for the cartridge but according to Linebaugh pressures levels between {{convert|30000|psi|bar|abbr=on}} and {{convert|35000|psi|bar|abbr=on}} are considered safe in the converted revolvers.
 
Due to the proprietary status of the cartridge neither the CIP nor SAAMI have published official specifications for the cartridge. As is the case, there can be some variations from gunsmith the gunsmith. No pressure standard has been published for the cartridge but according to Linebaugh pressures levels between {{convert|30000|psi|bar|abbr=on}} and {{convert|35000|psi|bar|abbr=on}} are considered safe in the converted revolvers.
   
The cartridge uses .510 in. (12.95&nbsp;mm) diameter jacketed bullets or .511-.512 in. (12.98-13.01&nbsp;mm) lead bullets.
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The cartridge uses .510 in. (12.95 mm) diameter jacketed bullets or .511-.512 in. (12.98-13.01 mm) lead bullets.
   
 
==Sporting Usage==
 
==Sporting Usage==
The .500 Linebaugh was designed as a hunting cartridge but would also make excellent backup firearm in areas where large bears may be encountered; particularly in Alaska. It was designed to fire a {{convert|440|gr|g|abbr=on}} bullet at {{convert|1300|ft/s|m/s|abbr=on}}.<ref>{{cite web |url=http://www.buffalobore.com/index.php?l=product_list&c=32 |title=.500 Linebaugh Ammo |publisher= Buffalo Bore Ammunition |accessdate=17 November 2010| archiveurl= http://web.archive.org/web/20101229090317/http://www.buffalobore.com/index.php?l=product_list&c=32| archivedate= 29 December 2010}}</ref> This particular loading generates {{convert|1650|ftlbf|J|abbr=on}} of energy making this one of the most powerful handgun cartridges put into production. In terms of energy, this is comparable to the [[.454 Casull]] cartridge. However, the .500 Linebaugh provides a larger diameter, heavier bullet with a greater sectional density than the .454 Casull. As a hunting cartridge it is capable of taking any North American game animals and most African game species.<ref name="CartridgesoftheWorld11"/>
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The .500 Linebaugh was designed as a hunting cartridge but would also make excellent backup firearm in areas where large bears may be encountered; particularly in Alaska. It was designed to fire a {{convert|440|gr|g|abbr=on}} bullet at {{convert|1300|ft/s|m/s|abbr=on}}.<ref>{{cite web |url=http://www.buffalobore.com/index.php?l=product_list&c=32 |title=.500 Linebaugh Ammo |publisher= Buffalo Bore Ammunition |accessdate=17 November 2010| archiveurl= http://web.archive.org/web/20101229090317/http://www.buffalobore.com/index.php?l=product_list&c=32| archivedate= 29 December 2010<!--Added by DASHBot-->}}</ref> This particular loading generates {{convert|1650|ftlbf|J|abbr=on}} of energy making this one of the most powerful handgun cartridges put into production. In terms of energy, this is comparable to the [[.454 Casull]] cartridge. However, the .500 Linebaugh provides a larger diameter, heavier bullet with a greater sectional density than the .454 Casull. As a hunting cartridge it is capable of taking any North American game animals and most African game species.<ref name="CartridgesoftheWorld11"/>
   
 
==Notes==
 
==Notes==

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