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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bartlein Press Release - New Barrel Material
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<blockquote data-quote="shortgrass" data-source="post: 1948625" data-attributes="member: 24284"><p>The interior of custom made rifle barrels (Krieger, Hart, Bartlein, Benchmark and the like) are usually not lapped beyond about 320g / 400g. Why? Because a perfectly smooth rifle barrel will copper foul like crazy. Too much friction! Those "circular marks" in some chambers help with bolt thrust. They give the brass something to grab to as it expands as pressure builds upon firing. Again, a good custom cut chamber is best when polished with no finer than 320g wet & dry paper.</p></blockquote><p></p>
[QUOTE="shortgrass, post: 1948625, member: 24284"] The interior of custom made rifle barrels (Krieger, Hart, Bartlein, Benchmark and the like) are usually not lapped beyond about 320g / 400g. Why? Because a perfectly smooth rifle barrel will copper foul like crazy. Too much friction! Those "circular marks" in some chambers help with bolt thrust. They give the brass something to grab to as it expands as pressure builds upon firing. Again, a good custom cut chamber is best when polished with no finer than 320g wet & dry paper. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bartlein Press Release - New Barrel Material
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