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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="Veteran" data-source="post: 2218706" data-attributes="member: 118038"><p>I was thinking what Tiny Tim was saying is if the die is over sizing and bumping the neck down a whole lot more than it should be, then a lot of brass gets pushed down in the case body flowing until it can't go past the belt. Then when the case gets fired, it elongates again everywhere including from the belt forward and from the shoulder forward. That repetitive pushing down the brass into the belt, and then firing and stretching it back out at the belt where it got pushed to is what causes fatique wear on the metal, and that's why the case separates just above the belt. If that ain't what he meant, then I dunno either. But, I think its possible. My sense is that if I am gonna full length size, belted magnums, I have to do a better job of measuring and understanding how much I'm sizing them and where that sizing is occuring in the case. </p><p></p><p>If the consensus here is that if I bump the shoulder back about .002 that this will solve the problem, I'm gonna try that. </p><p>I'm also gonna know if I have actually been over sizing and pushing too much metal down on that belt each time, either way--</p><p>cause I'm gonna start measuring things a lot more precisely vs. just trusting RCBS said turn the die this many turns, and all will be well!</p><p>Cause that sure did not work! Pulling broken shell casings like hotcakes outta breeches makes me think reloading is dangerous!</p><p>.300 win mag or .338 LM ain't supposed to to be shooting cases in little pieces and parts back to the rear..........</p></blockquote><p></p>
[QUOTE="Veteran, post: 2218706, member: 118038"] I was thinking what Tiny Tim was saying is if the die is over sizing and bumping the neck down a whole lot more than it should be, then a lot of brass gets pushed down in the case body flowing until it can't go past the belt. Then when the case gets fired, it elongates again everywhere including from the belt forward and from the shoulder forward. That repetitive pushing down the brass into the belt, and then firing and stretching it back out at the belt where it got pushed to is what causes fatique wear on the metal, and that's why the case separates just above the belt. If that ain't what he meant, then I dunno either. But, I think its possible. My sense is that if I am gonna full length size, belted magnums, I have to do a better job of measuring and understanding how much I'm sizing them and where that sizing is occuring in the case. If the consensus here is that if I bump the shoulder back about .002 that this will solve the problem, I'm gonna try that. I'm also gonna know if I have actually been over sizing and pushing too much metal down on that belt each time, either way-- cause I'm gonna start measuring things a lot more precisely vs. just trusting RCBS said turn the die this many turns, and all will be well! Cause that sure did not work! Pulling broken shell casings like hotcakes outta breeches makes me think reloading is dangerous! .300 win mag or .338 LM ain't supposed to to be shooting cases in little pieces and parts back to the rear.......... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing Vs. Full Length Sizing and Neck Tension
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