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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Drop-in heavy contour 26" barrel for M70 300wm
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<blockquote data-quote="Bart B" data-source="post: 790917" data-attributes="member: 5302"><p>A drop in barrel typically requires its chamber to be finish reamed to headspace specs. There's no guarantee a drop in barrel will headspace correctly because the dimensions of the bolt and receiver are not known; they control the final fit of the barrel for safety.</p><p></p><p>If accuracy is your top objecive and it has to be fluted, have the barrel fluted after it is gun drilled and before it's reamed to bore diameter then rifled with either cut or button method and finally lapped to specs. Note also that fluting a profiled barrel makes it less stiff than before it's fluted; 10 to 15 percent of the metal that resists bending and makes it stiff gets removed.</p></blockquote><p></p>
[QUOTE="Bart B, post: 790917, member: 5302"] A drop in barrel typically requires its chamber to be finish reamed to headspace specs. There's no guarantee a drop in barrel will headspace correctly because the dimensions of the bolt and receiver are not known; they control the final fit of the barrel for safety. If accuracy is your top objecive and it has to be fluted, have the barrel fluted after it is gun drilled and before it's reamed to bore diameter then rifled with either cut or button method and finally lapped to specs. Note also that fluting a profiled barrel makes it less stiff than before it's fluted; 10 to 15 percent of the metal that resists bending and makes it stiff gets removed. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Drop-in heavy contour 26" barrel for M70 300wm
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