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Rifles, Reloading, Optics, Equipment
Reloading
Weird Ring
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<blockquote data-quote="nmbarta" data-source="post: 2157777" data-attributes="member: 78438"><p>The head of the case, is where the letters/numbers are, not where you circled the case. Case head separation usually happens where the web meets the case wall. Based on what I'm seeing I would guess you have a chamber issue, but your not running your load too hot (which would be good) and your brass is not flowing into the flaw in your chamber, but there is some carbon that builds in those spots. There is also a ring where the neck meets the shoulder, all of the rings are consistently placed on the brass. This indicates that it is not a brass issue, but a chamber issue. From what you've described, you don't have a headspace problem. I've been wrong plenty of times, but I'd bet on chamber problems, lapua brass is tough and can hide pressure issues. Just like ejector marks, you shouldn't see them until your brass hits the point that it starts to "flow". Your brass, shouldn't "flow" into those small flaws until you get to your max (or really just past your max) load. The marks are too perfect, and too consistent to be anything else imo. Case head separation in multiple cases will happen in "about" the same spot, but it doesn't look like that. </p><p>When I zoom in on your picture, I can see that your chamber is a bit rough. I can see rings that parallel the obvious ones, this is consistent with machining problems. It might be minor enough to have it polished out. Hard to tell from here. </p><p>Good luck with it, keep asking questions.</p></blockquote><p></p>
[QUOTE="nmbarta, post: 2157777, member: 78438"] The head of the case, is where the letters/numbers are, not where you circled the case. Case head separation usually happens where the web meets the case wall. Based on what I'm seeing I would guess you have a chamber issue, but your not running your load too hot (which would be good) and your brass is not flowing into the flaw in your chamber, but there is some carbon that builds in those spots. There is also a ring where the neck meets the shoulder, all of the rings are consistently placed on the brass. This indicates that it is not a brass issue, but a chamber issue. From what you've described, you don't have a headspace problem. I've been wrong plenty of times, but I'd bet on chamber problems, lapua brass is tough and can hide pressure issues. Just like ejector marks, you shouldn't see them until your brass hits the point that it starts to "flow". Your brass, shouldn't "flow" into those small flaws until you get to your max (or really just past your max) load. The marks are too perfect, and too consistent to be anything else imo. Case head separation in multiple cases will happen in "about" the same spot, but it doesn't look like that. When I zoom in on your picture, I can see that your chamber is a bit rough. I can see rings that parallel the obvious ones, this is consistent with machining problems. It might be minor enough to have it polished out. Hard to tell from here. Good luck with it, keep asking questions. [/QUOTE]
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Reloading
Weird Ring
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