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Rifles, Reloading, Optics, Equipment
Gunsmithing
New barrel chamber off center, 2 lands going back to neck... Pictures
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<blockquote data-quote="tobnpr" data-source="post: 2491980" data-attributes="member: 68758"><p>True, but that's only part of it.</p><p>It's critical for accuracy that once launched- the bearing surface of the bullet contacts <em>all </em>the lands at the same time so that they're evenly engraved into the jacket as it spins down the tube. Keeps the bullet perfectly centered and flying straight.</p><p></p><p>If the bullet contacts, say two of the grooves first in a non-concentric chamber- they'll push the bullet off-center enough to affect accuracy. We're talking a few thousandths of an inch, and milliseconds- but it's enough to manifest at the target.</p></blockquote><p></p>
[QUOTE="tobnpr, post: 2491980, member: 68758"] True, but that's only part of it. It's critical for accuracy that once launched- the bearing surface of the bullet contacts [I]all [/I]the lands at the same time so that they're evenly engraved into the jacket as it spins down the tube. Keeps the bullet perfectly centered and flying straight. If the bullet contacts, say two of the grooves first in a non-concentric chamber- they'll push the bullet off-center enough to affect accuracy. We're talking a few thousandths of an inch, and milliseconds- but it's enough to manifest at the target. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
New barrel chamber off center, 2 lands going back to neck... Pictures
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