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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Chamber? Bolt face? or Dies?
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<blockquote data-quote="brian b" data-source="post: 70272" data-attributes="member: 2797"><p>[ QUOTE ]</p><p>This seems to be a common problem with the Rem 700's. My gun and 4ked Horn's 308's do exactly the same thing that you are describing to the case after firing. </p><p>Eventually there will be a line that you can feel on the inside of the case around the base (where you see the bulge). If you stick a unfolded paper slip down the inner wall of the case, you will feel a line that feels like a "thin spot" in the brass and may be indicative that a case-head separation will happen soon.</p><p></p><p>I have no clue as to why this happens - it may not be just one thing, but a combination of variations that would occur in the mass-production process. </p><p></p><p>[/ QUOTE ]Gonehuntingagain,</p><p>You are absolutely correct IT IS a combination of variations that causes this. #1 saami spec. reamers (that are oversize in comparison to most brass if not all). #2 HEAD SPACE ( if you are getting thin spots in the web area most likely head space is long in the chamber or you are oversizing your brass) Remington is famous for this but absolutely the worst I have seen is Thompsons in some of there contender chamberings where the web of the chamber is .010 larger the head space is .015 longer and the throat is unreachable. this can ruin even the best of brass after only a few firings. that is why most of the people on this forum try an AFTERMARKET experience (custom barrels,snug if not tight neck chambers ,good if not great reloading equiptment and patience with mediocre things that we wished we had control over but DONT.) B.</p></blockquote><p></p>
[QUOTE="brian b, post: 70272, member: 2797"] [ QUOTE ] This seems to be a common problem with the Rem 700's. My gun and 4ked Horn's 308's do exactly the same thing that you are describing to the case after firing. Eventually there will be a line that you can feel on the inside of the case around the base (where you see the bulge). If you stick a unfolded paper slip down the inner wall of the case, you will feel a line that feels like a "thin spot" in the brass and may be indicative that a case-head separation will happen soon. I have no clue as to why this happens - it may not be just one thing, but a combination of variations that would occur in the mass-production process. [/ QUOTE ]Gonehuntingagain, You are absolutely correct IT IS a combination of variations that causes this. #1 saami spec. reamers (that are oversize in comparison to most brass if not all). #2 HEAD SPACE ( if you are getting thin spots in the web area most likely head space is long in the chamber or you are oversizing your brass) Remington is famous for this but absolutely the worst I have seen is Thompsons in some of there contender chamberings where the web of the chamber is .010 larger the head space is .015 longer and the throat is unreachable. this can ruin even the best of brass after only a few firings. that is why most of the people on this forum try an AFTERMARKET experience (custom barrels,snug if not tight neck chambers ,good if not great reloading equiptment and patience with mediocre things that we wished we had control over but DONT.) B. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Chamber? Bolt face? or Dies?
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