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Rifles, Reloading, Optics, Equipment
Reloading
Excessive case expansion question
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<blockquote data-quote="Hunt5BN" data-source="post: 2414449" data-attributes="member: 91430"><p>I hope someone can help me with this. I had a local gunsmith cut, chamber and install a Krieger barrel on my rifle. The rifle is a Remington 700 in .308 Win. I have been reloading for the rifle and getting some great results as far as accuracy, SD and ES. The problem I have is that after reloading the brass 2-3 times I am experiencing case head separation . </p><p></p><p>I am using new Lapua brass and Redding full length competition neck size dies. I am using load data from the latest Hornady manual. The latest case failure was Lapua brass with a 155 grain ELD match bullet and 40 grains of Varget with a federal GMM primer. The brass had been reload twice previously. The Hornady manual lists the starting charge weight at 35.9 grains and max charge at 44.9. </p><p></p><p>I have my resizing die set to bump the shoulder back 0.001. </p><p></p><p>What I have noticed is that the case web expansion is pretty extreme on my fired brass. The SAAMI brass spec for the area just above the extractor cut is .4703. My fired brass measures .4740. when I have the die screwed in far enough to bump the shoulder it resizes the web to .4700. I tried to chamber this unloaded brass in my son's stock Remington 700 and it won't even let me close the bolt. </p><p></p><p>My questions are, can the rifle's chamber be recut (resulting in shorter barrel?), or can I just neck size the brass to avoid overworking the web area with full length resizing, or do I jest get a new barrel?</p><p>thanks in advance for any input!</p></blockquote><p></p>
[QUOTE="Hunt5BN, post: 2414449, member: 91430"] I hope someone can help me with this. I had a local gunsmith cut, chamber and install a Krieger barrel on my rifle. The rifle is a Remington 700 in .308 Win. I have been reloading for the rifle and getting some great results as far as accuracy, SD and ES. The problem I have is that after reloading the brass 2-3 times I am experiencing case head separation . I am using new Lapua brass and Redding full length competition neck size dies. I am using load data from the latest Hornady manual. The latest case failure was Lapua brass with a 155 grain ELD match bullet and 40 grains of Varget with a federal GMM primer. The brass had been reload twice previously. The Hornady manual lists the starting charge weight at 35.9 grains and max charge at 44.9. I have my resizing die set to bump the shoulder back 0.001. What I have noticed is that the case web expansion is pretty extreme on my fired brass. The SAAMI brass spec for the area just above the extractor cut is .4703. My fired brass measures .4740. when I have the die screwed in far enough to bump the shoulder it resizes the web to .4700. I tried to chamber this unloaded brass in my son’s stock Remington 700 and it won’t even let me close the bolt. My questions are, can the rifle’s chamber be recut (resulting in shorter barrel?), or can I just neck size the brass to avoid overworking the web area with full length resizing, or do I jest get a new barrel? thanks in advance for any input! [/QUOTE]
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Excessive case expansion question
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