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Rifles, Reloading, Optics, Equipment
Reloading
Model 700 extraction issue
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<blockquote data-quote="bigedp51" data-source="post: 1518702" data-attributes="member: 28965"><p>You measure the resized case body and see how much smaller in diameter it is from its fired diameter.</p><p></p><p>Color the entire case with a black felt tip marker after sizing and see where the case is rubbing or binding in the chamber.</p><p></p><p>1. Is the die oversized and not reducing the case diameter.</p><p>2. Is the case body bulging and rubbing in one area.</p><p>3. If the case is bulging on one side is it the chamber or bad brass.</p><p></p><p>A case with unequal case wall thickness can warp when fired. The thin side of the case expands more and the case becomes egg shaped. The case can even become banana shaped with the base of the case no longer 90 degrees to the axis of the bore.</p><p></p><p>I have seen warped cases but they were all fired in large diameter military chambers.</p><p></p><p>NECO Case Gauge</p><p><a href="https://www.neconos.com/item/Concentricity-Wall-Thickness-and-Runout-Gauge-12" target="_blank">https://www.neconos.com/item/Concentricity-Wall-Thickness-and-Runout-Gauge-12</a></p><p>"The NECO, patented, Case Gauge is the most versatile instrument available for measuring the various accuracy determining factors of cartridge cases, bullets and loaded ammunition. No other gauge can measure all of the following: 1.Banana curvature of case. 2.Wall and neck thickness variations. 3.Case head squareness. 4.Banana curvature and out-of-round shape of individual bullets. 5.Runout of seated bullet. 6.Total runout of loaded cartridge."</p></blockquote><p></p>
[QUOTE="bigedp51, post: 1518702, member: 28965"] You measure the resized case body and see how much smaller in diameter it is from its fired diameter. Color the entire case with a black felt tip marker after sizing and see where the case is rubbing or binding in the chamber. 1. Is the die oversized and not reducing the case diameter. 2. Is the case body bulging and rubbing in one area. 3. If the case is bulging on one side is it the chamber or bad brass. A case with unequal case wall thickness can warp when fired. The thin side of the case expands more and the case becomes egg shaped. The case can even become banana shaped with the base of the case no longer 90 degrees to the axis of the bore. I have seen warped cases but they were all fired in large diameter military chambers. NECO Case Gauge [URL]https://www.neconos.com/item/Concentricity-Wall-Thickness-and-Runout-Gauge-12[/URL] "The NECO, patented, Case Gauge is the most versatile instrument available for measuring the various accuracy determining factors of cartridge cases, bullets and loaded ammunition. No other gauge can measure all of the following: 1.Banana curvature of case. 2.Wall and neck thickness variations. 3.Case head squareness. 4.Banana curvature and out-of-round shape of individual bullets. 5.Runout of seated bullet. 6.Total runout of loaded cartridge." [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Model 700 extraction issue
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