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Rifles, Reloading, Optics, Equipment
Reloading
Case head separation due to FL resizing brass?
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<blockquote data-quote="sedancowboy" data-source="post: 1732898" data-attributes="member: 85874"><p>There at least a 100 threads dealing with this issue so try using the search engine above. However I will try and answer your questions briefly. There are several things that could be going on. High pressure being one I can't help you with that one but to say just back off a bit. How are you determining your shoulder set back? Do you have a bump gauge? If you are actually only bumping the shoulders back .002 and not running over pressure loads then there is no reason to have case head separation on a belted case. In fact you should be headspacing off the shoulder and the belt is not in play at that time. Perhaps the brass has been shoot in another rifle? Usually if you start with new brass the shoulder will grow about .010-.018 on the first firing because it is headspacing off the belt. Perhaps it is not fully blown out and so while you think you are only bumping your shoulders back .002 you are in fact bumping them back much more. How often are you having to trim your brass and how much? Are you annealing? The simple answer is you are overworking your brass and you will have to determine what is causing it. The brass is stretching out a little on each firing until it fails in front of the belt.</p><p>Hope that help </p><p>Henry</p></blockquote><p></p>
[QUOTE="sedancowboy, post: 1732898, member: 85874"] There at least a 100 threads dealing with this issue so try using the search engine above. However I will try and answer your questions briefly. There are several things that could be going on. High pressure being one I can't help you with that one but to say just back off a bit. How are you determining your shoulder set back? Do you have a bump gauge? If you are actually only bumping the shoulders back .002 and not running over pressure loads then there is no reason to have case head separation on a belted case. In fact you should be headspacing off the shoulder and the belt is not in play at that time. Perhaps the brass has been shoot in another rifle? Usually if you start with new brass the shoulder will grow about .010-.018 on the first firing because it is headspacing off the belt. Perhaps it is not fully blown out and so while you think you are only bumping your shoulders back .002 you are in fact bumping them back much more. How often are you having to trim your brass and how much? Are you annealing? The simple answer is you are overworking your brass and you will have to determine what is causing it. The brass is stretching out a little on each firing until it fails in front of the belt. Hope that help Henry [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Case head separation due to FL resizing brass?
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