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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Brass Life?
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<blockquote data-quote="Warren Jensen" data-source="post: 20875" data-attributes="member: 21"><p>Primetime,</p><p></p><p>You have phrased your question in a way that makes it a little difficult to answer. Strictly speaking there is no direct relationship between the amount of times a case has been fired and accuracy. If it is not work hardened at the neck a case can be fired many times with very good accuracy. The less pressure you apply during firing and the less you work the brass during resizing, the longer it will last. Cases have been known to be very accurate at 20, 30 ,40 and more firings. Some folks will anneal their case necks when they harden to extend the case life. </p><p></p><p>What makes a particular case accurate is it's uniformity of performance with regard to other cases. Case weight is important, case wall thickness especially in the neck is also important. Some benchrest shooters go to extreme lengths to insure case uniformity. This includes workhardening so cases need to be segregated according to how many times they have been fired.</p><p></p><p>As you stated that you are full length sizing for each reload, this is as important a factor in any case workhardening as the firing itself. Different manufacturers resizing dies work the brass much more than others. Also, your resizing die could be inducing errors with each use.</p></blockquote><p></p>
[QUOTE="Warren Jensen, post: 20875, member: 21"] Primetime, You have phrased your question in a way that makes it a little difficult to answer. Strictly speaking there is no direct relationship between the amount of times a case has been fired and accuracy. If it is not work hardened at the neck a case can be fired many times with very good accuracy. The less pressure you apply during firing and the less you work the brass during resizing, the longer it will last. Cases have been known to be very accurate at 20, 30 ,40 and more firings. Some folks will anneal their case necks when they harden to extend the case life. What makes a particular case accurate is it's uniformity of performance with regard to other cases. Case weight is important, case wall thickness especially in the neck is also important. Some benchrest shooters go to extreme lengths to insure case uniformity. This includes workhardening so cases need to be segregated according to how many times they have been fired. As you stated that you are full length sizing for each reload, this is as important a factor in any case workhardening as the firing itself. Different manufacturers resizing dies work the brass much more than others. Also, your resizing die could be inducing errors with each use. [/QUOTE]
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