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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel fluting post build affect accuracy?
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<blockquote data-quote="Richard338" data-source="post: 70110" data-attributes="member: 1537"><p>A steel object that expands due to heating will expand in ALL its dimensions by a constant factor.</p><p>That means that the length will be multiplied by (say) 1.001, so will the barrel thickness, and the bore.</p><p>The bore enlarges, not constricts. I once worked this out for someone who thought their tight necked chamber was constricting onto their brass.</p><p>In fact the bore enlarges (but only very slightly at realistic temperatures).</p><p>Brass has a larger coefficient of expansion and will expand slightly more at the same temp. So with really high temps if you let your cartridge soak up a lot of heat, it could be slightly tighter fit.</p><p>Realistically this should never pose a problem. The situation is similar but slightly more complicated with differential heating/cooling.</p><p></p><p>Bottom line, very little difference in bore at realistic temps. What difference there is is an enlargement.</p></blockquote><p></p>
[QUOTE="Richard338, post: 70110, member: 1537"] A steel object that expands due to heating will expand in ALL its dimensions by a constant factor. That means that the length will be multiplied by (say) 1.001, so will the barrel thickness, and the bore. The bore enlarges, not constricts. I once worked this out for someone who thought their tight necked chamber was constricting onto their brass. In fact the bore enlarges (but only very slightly at realistic temperatures). Brass has a larger coefficient of expansion and will expand slightly more at the same temp. So with really high temps if you let your cartridge soak up a lot of heat, it could be slightly tighter fit. Realistically this should never pose a problem. The situation is similar but slightly more complicated with differential heating/cooling. Bottom line, very little difference in bore at realistic temps. What difference there is is an enlargement. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Barrel fluting post build affect accuracy?
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