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<blockquote data-quote="swampratt" data-source="post: 3596856" data-attributes="member: 15054"><p>I did a brass fail test in .308 All rounds were full length sized and NOT annealed.</p><p>Case length growth actually began to thin the case head and all cases died of case head crack.</p><p>Going by memory here Winchester went 18 reloads.</p><p>Lapua went 48.</p><p>Federal was about the same as lapua and 54 reloads from Remington cases.</p><p>This was in the lower accuracy node for my Savage 10FP rifle.</p><p>41-42gr Varget CCI 200 and 165 Game King Hollow point boat tail.</p><p>Very accurate sub moa for all cases right up to the point of case head crack and I fired them one more time with the crack that could be felt and they all lived.</p><p>SHTF test there.</p><p></p><p></p><p>If you are after bench rest accuracy you should anneal each time.</p><p>I anneal each time.</p><p>If you are a plinker of steel or clays or water bottles you can get by with less brass prep.</p><p>Especially if a flier now and then does not bother you so much.</p><p></p><p>I began a test of Neck sizing only to check case life and lost the case and supplies got high.</p><p>Some will neck size a couple times and then you get a stiff bolt closure and then they will full length size.</p><p></p><p>Well my bolt rifles will not shoot neck size and FLS the same so I pick one or the other.</p><p></p><p>Now I found after 5 times necksizing the .308 case that bolt closure did not get any harder.</p><p>In fact 20 times neck sized closed with the same pressure as 5 times neck sized.</p><p>I measured case length growth and the first 4 firings it grew at a rate of .0005" per firing.</p><p>After 5 times neck sized it slowed down to 1/2 of that.</p><p></p><p>I was getting .001" to .003" with FLS cases and that failed them quicker.</p><p></p><p>I would bet 100 reloads from a .308 neck sizing only with a low accuracy node load like the above.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3596856, member: 15054"] I did a brass fail test in .308 All rounds were full length sized and NOT annealed. Case length growth actually began to thin the case head and all cases died of case head crack. Going by memory here Winchester went 18 reloads. Lapua went 48. Federal was about the same as lapua and 54 reloads from Remington cases. This was in the lower accuracy node for my Savage 10FP rifle. 41-42gr Varget CCI 200 and 165 Game King Hollow point boat tail. Very accurate sub moa for all cases right up to the point of case head crack and I fired them one more time with the crack that could be felt and they all lived. SHTF test there. If you are after bench rest accuracy you should anneal each time. I anneal each time. If you are a plinker of steel or clays or water bottles you can get by with less brass prep. Especially if a flier now and then does not bother you so much. I began a test of Neck sizing only to check case life and lost the case and supplies got high. Some will neck size a couple times and then you get a stiff bolt closure and then they will full length size. Well my bolt rifles will not shoot neck size and FLS the same so I pick one or the other. Now I found after 5 times necksizing the .308 case that bolt closure did not get any harder. In fact 20 times neck sized closed with the same pressure as 5 times neck sized. I measured case length growth and the first 4 firings it grew at a rate of .0005" per firing. After 5 times neck sized it slowed down to 1/2 of that. I was getting .001" to .003" with FLS cases and that failed them quicker. I would bet 100 reloads from a .308 neck sizing only with a low accuracy node load like the above. [/QUOTE]
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