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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Carbon barrels
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<blockquote data-quote="Zymurgist" data-source="post: 1824972" data-attributes="member: 73422"><p>A material's ability to conduct heat can be measured, steel is around 50 watts per sq. meter-kelvin. The thermal coefficient going across the weave and resin of a CF barrel is about 5W/mk for a metal powder doped resin. The CF wrapped around a steel bore core acts more as an insulator as it is thermally inefficient compared to an all steel barrel.</p><p></p><p>A CF barrel has less Thermal Mass than an all steel barrel and this causes it to have less Specific Heat Capacity than the steel barrel. As a result of that and the fact the heat cannot escape as quickly, the temperature of the CF bore core will rise higher and faster than the bore of an all steel barrel even while a CF barrel may not feel feel hot to the touch.</p><p></p><p>The steel bore core and CF composite have different coefficients of expansion and as they heat up will cause mechanical stresses in the barrel moving your zero and degrading your shot repeatability. Many CF rifle owners buy/build devices to blow air through the bore of their rifle to cool them between shots. Keep in mind CF barrels require a bit more effort in their care and feeding.</p></blockquote><p></p>
[QUOTE="Zymurgist, post: 1824972, member: 73422"] A material's ability to conduct heat can be measured, steel is around 50 watts per sq. meter-kelvin. The thermal coefficient going across the weave and resin of a CF barrel is about 5W/mk for a metal powder doped resin. The CF wrapped around a steel bore core acts more as an insulator as it is thermally inefficient compared to an all steel barrel. A CF barrel has less Thermal Mass than an all steel barrel and this causes it to have less Specific Heat Capacity than the steel barrel. As a result of that and the fact the heat cannot escape as quickly, the temperature of the CF bore core will rise higher and faster than the bore of an all steel barrel even while a CF barrel may not feel feel hot to the touch. The steel bore core and CF composite have different coefficients of expansion and as they heat up will cause mechanical stresses in the barrel moving your zero and degrading your shot repeatability. Many CF rifle owners buy/build devices to blow air through the bore of their rifle to cool them between shots. Keep in mind CF barrels require a bit more effort in their care and feeding. [/QUOTE]
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