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Sporter Barrels vs Heavy Barrels
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<blockquote data-quote="Pdvdh" data-source="post: 388016" data-attributes="member: 4191"><p>Increase barrel diameter from 11/16" to 1" diameter (plain straight cylinder shape), and the surface area increases <strong>45%</strong>, for any equivalent barrel length.</p><p></p><p>With a .284 bore, the same increase in barrel diameter will increase barrel mass by <strong>155%</strong>, for any equivalent barrel length.</p><p></p><p>I suspect barrel temperatures would remain lower in the heavier barrel under most reasonable scenarios of prolonged fire, as much due to increased barrel mass as due to any increased surface area. </p><p></p><p>At high rates of sustained fire, I expect both bores would be toast in short order, with respect to accuracy - no matter the diameter or the exterior surface temperature. The heavier barrel would probably dissipate the heat of several extra shots within its extra mass before it was also cooked. </p><p></p><p>When I consider these type of questions, I go to extremes, and that usually leads to insights which are reasonably correct. For example, what would be expected from a 12" diameter barrel versus a 3/8" diameter barrel. The exterior of the 12" diameter barrel will remain cool for a long time. But the interior bore surface could still be cooked with overly agressive rates of fire.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 388016, member: 4191"] Increase barrel diameter from 11/16" to 1" diameter (plain straight cylinder shape), and the surface area increases [B]45%[/B], for any equivalent barrel length. With a .284 bore, the same increase in barrel diameter will increase barrel mass by [B]155%[/B], for any equivalent barrel length. I suspect barrel temperatures would remain lower in the heavier barrel under most reasonable scenarios of prolonged fire, as much due to increased barrel mass as due to any increased surface area. At high rates of sustained fire, I expect both bores would be toast in short order, with respect to accuracy - no matter the diameter or the exterior surface temperature. The heavier barrel would probably dissipate the heat of several extra shots within its extra mass before it was also cooked. When I consider these type of questions, I go to extremes, and that usually leads to insights which are reasonably correct. For example, what would be expected from a 12" diameter barrel versus a 3/8" diameter barrel. The exterior of the 12" diameter barrel will remain cool for a long time. But the interior bore surface could still be cooked with overly agressive rates of fire. [/QUOTE]
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Sporter Barrels vs Heavy Barrels
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