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Rifles, Reloading, Optics, Equipment
Reloading
Cooper rifle won't chamber twice fired brass
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<blockquote data-quote="BountyHunter" data-source="post: 1865856" data-attributes="member: 12"><p>It is not the gun!!!! It is the dies!!!! </p><p></p><p>Rebarreling it with the same spec reamer will not fix the problem. You have .010 variance allowed between minimum and maximum SAAMI at that point on the chamber. that is the usual number also on most cartridges.</p><p></p><p>The chamber is probably within spec. Same thing for the dies according to their sizer specs probably. Looks like you simply have a chamber larger at the base and same for dies. The dies are not small enough at the bottom to size the brass, yet again I bet they are all within their specs. That is not an uncommon thing. Couple ways to fix, try different dies until you find one that will size or go to a small base die. Now IF a small base die does not work THEN you have an issue to send the gun back to Cooper. But the issue is the chamber is way oversize and out of specs which I doubt, but it is not undersized for sure.</p><p></p><p>That is also why IF you use a minimum SAAMI reamer you often have to go to custom dies too.</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 1865856, member: 12"] It is not the gun!!!! It is the dies!!!! Rebarreling it with the same spec reamer will not fix the problem. You have .010 variance allowed between minimum and maximum SAAMI at that point on the chamber. that is the usual number also on most cartridges. The chamber is probably within spec. Same thing for the dies according to their sizer specs probably. Looks like you simply have a chamber larger at the base and same for dies. The dies are not small enough at the bottom to size the brass, yet again I bet they are all within their specs. That is not an uncommon thing. Couple ways to fix, try different dies until you find one that will size or go to a small base die. Now IF a small base die does not work THEN you have an issue to send the gun back to Cooper. But the issue is the chamber is way oversize and out of specs which I doubt, but it is not undersized for sure. That is also why IF you use a minimum SAAMI reamer you often have to go to custom dies too. [/QUOTE]
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Reloading
Cooper rifle won't chamber twice fired brass
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