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Rifles, Reloading, Optics, Equipment
Reloading
Brass prep
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<blockquote data-quote="J E Custom" data-source="post: 1808658" data-attributes="member: 2736"><p>No.</p><p>By turning the necks before the case has been fired in a concentric chamber, if there is any misalignment of the "NECK" (Off center) The chamber will true the case neck to the bore for perfect alignment of the bullet.</p><p></p><p>The outside of the case body will be whatever the chamber is but the neck will align with the bore because it has been turned true in thickness and expand evenly. Nothing can be done for the inside except for matching the volume of the case</p><p></p><p>If the neck is not turned true the difference in neck thickness will push the neck bore off center by the amount of difference of thickness. Also the thin side of the neck will move/expand first and try to fill the neck chamber, compounding the thinning of the neck in those areas. In many cases where the neck hasn't been turned a fired case will resist chambering because of the misalignment unless it is placed in the chamber oriented the same way that it was fired.</p><p></p><p>This is why I check for concentricity after firing the first time and then after sizing. also after bullet seating. This way I can tell where the weakness in the process and if I start with a concentric case. and if any concentricity is found during loading steps I can try to work on that part. If you prepare the case properly, a good chamber will correct any misalignment of the neck.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1808658, member: 2736"] No. By turning the necks before the case has been fired in a concentric chamber, if there is any misalignment of the "NECK" (Off center) The chamber will true the case neck to the bore for perfect alignment of the bullet. The outside of the case body will be whatever the chamber is but the neck will align with the bore because it has been turned true in thickness and expand evenly. Nothing can be done for the inside except for matching the volume of the case If the neck is not turned true the difference in neck thickness will push the neck bore off center by the amount of difference of thickness. Also the thin side of the neck will move/expand first and try to fill the neck chamber, compounding the thinning of the neck in those areas. In many cases where the neck hasn't been turned a fired case will resist chambering because of the misalignment unless it is placed in the chamber oriented the same way that it was fired. This is why I check for concentricity after firing the first time and then after sizing. also after bullet seating. This way I can tell where the weakness in the process and if I start with a concentric case. and if any concentricity is found during loading steps I can try to work on that part. If you prepare the case properly, a good chamber will correct any misalignment of the neck. J E CUSTOM [/QUOTE]
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