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Rifles, Reloading, Optics, Equipment
Gunsmithing
Chamber reamer question ?
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<blockquote data-quote="J E Custom" data-source="post: 1138359" data-attributes="member: 2736"><p>Don't be, he did it right. </p><p></p><p>.315 is the maximum neck diameter for a loaded round.</p><p></p><p>.3176 is the chamber dimension for the neck and that's close, I normally will have .004 thousandths clearance in the neck for expansion without pressure.</p><p></p><p>.003 clearance between the neck of the loaded ammo and the neck chamber is minimum. Most big bores have .006 to .008 clearance when loaded</p><p></p><p>if your neck brass is thicker than .014 thousandths you may have to turn the necks down to get .003 to .004 thousandths clearance. </p><p></p><p>.284 + .014 + .014 + .004 = .316</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1138359, member: 2736"] Don't be, he did it right. .315 is the maximum neck diameter for a loaded round. .3176 is the chamber dimension for the neck and that's close, I normally will have .004 thousandths clearance in the neck for expansion without pressure. .003 clearance between the neck of the loaded ammo and the neck chamber is minimum. Most big bores have .006 to .008 clearance when loaded if your neck brass is thicker than .014 thousandths you may have to turn the necks down to get .003 to .004 thousandths clearance. .284 + .014 + .014 + .004 = .316 J E CUSTOM [/QUOTE]
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Chamber reamer question ?
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