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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing Vs. Full Length Sizing and Neck Tension
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<blockquote data-quote="brant89" data-source="post: 2220072" data-attributes="member: 49553"><p>I don't have a lot of experience case separations as I am pretty careful to avoid them, but it's my understanding that most cases will get thin and separate just above the case head simply because the case head is much harder than the rest of the case so there is a discontinuity in that area. That being said, I have experienced several case separations this past year, some even separated in my FL die. All were LC18 5.56 brass with about 3-4 firings, and all the cases separated right at the body/shoulder junction. I'm more inclined to think there is something wrong with that lot of brass, but it does provide some evidence that brass could separate pretty much anywhere. I think the main takeaway from the brass migration discussion is this: if your brass is getting longer and requiring a trim often, then it is getting thin somewhere, and that's not good. I once heard a general rule that brass should be scrapped after 3-4 trimmings (not firings) to prevent case separation, and I generally abide by this.</p></blockquote><p></p>
[QUOTE="brant89, post: 2220072, member: 49553"] I don't have a lot of experience case separations as I am pretty careful to avoid them, but it's my understanding that most cases will get thin and separate just above the case head simply because the case head is much harder than the rest of the case so there is a discontinuity in that area. That being said, I have experienced several case separations this past year, some even separated in my FL die. All were LC18 5.56 brass with about 3-4 firings, and all the cases separated right at the body/shoulder junction. I'm more inclined to think there is something wrong with that lot of brass, but it does provide some evidence that brass could separate pretty much anywhere. I think the main takeaway from the brass migration discussion is this: if your brass is getting longer and requiring a trim often, then it is getting thin somewhere, and that's not good. I once heard a general rule that brass should be scrapped after 3-4 trimmings (not firings) to prevent case separation, and I generally abide by this. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing Vs. Full Length Sizing and Neck Tension
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