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Rifles, Reloading, Optics, Equipment
Reloading
Cooper rifle won't chamber twice fired brass
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<blockquote data-quote="MNbogboy" data-source="post: 1866284" data-attributes="member: 18849"><p>IF head separation has been initiated, and it may have by the appearance in this picture, it may have started at the first firing when the brass was new. </p><p>Even with proper shoulder bump the second firing will always add some more thinning at the front of the web.</p><p>The next sizing may "bulge"/deform the thinned area. This brings us to the question somebody asked; will the two fired unsized brass chamber?</p><p>The "paper clip" pic test as mentioned may instantly reveal if this is the problem. Also a picture of the suspect brass before sizing and without Sharpie coloring may also give visual clues.</p><p></p><p>If there is no thinning evident and the unsized two fired brass chambers the problem can then be narrowed down to the sizing dies or the sizing operation/technique itself.</p><p></p><p>If it is the chamber in the rifle most likely the two fired brass nut in sizes brass would not rechamber (in all positions). Caused by oversized (egged) setup issues.</p><p></p><p>Do you have some pictures of two fired but in sizes brass? </p><p></p><p>Just some thoughts,</p><p>Randy</p></blockquote><p></p>
[QUOTE="MNbogboy, post: 1866284, member: 18849"] IF head separation has been initiated, and it may have by the appearance in this picture, it may have started at the first firing when the brass was new. Even with proper shoulder bump the second firing will always add some more thinning at the front of the web. The next sizing may "bulge"/deform the thinned area. This brings us to the question somebody asked; will the two fired unsized brass chamber? The "paper clip" pic test as mentioned may instantly reveal if this is the problem. Also a picture of the suspect brass before sizing and without Sharpie coloring may also give visual clues. If there is no thinning evident and the unsized two fired brass chambers the problem can then be narrowed down to the sizing dies or the sizing operation/technique itself. If it is the chamber in the rifle most likely the two fired brass nut in sizes brass would not rechamber (in all positions). Caused by oversized (egged) setup issues. Do you have some pictures of two fired but in sizes brass? Just some thoughts, Randy [/QUOTE]
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Cooper rifle won't chamber twice fired brass
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