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Rifles, Reloading, Optics, Equipment
Reloading
Extracting split cases from chambers
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<blockquote data-quote="MNbogboy" data-source="post: 1600694" data-attributes="member: 18849"><p>Perfect question.</p><p>Most of us will become painfully aware during our reloading career that The main reason for "split" cases (incipient head separation) is over stretching your brass. </p><p>When forming Ackley cartridges it is important that the case head be held against the bolt head as tbrice23 states.</p><p>A true Ackley chamber has built in interference (.002-.004) to provide this. This is based on saami spec parent case. Not all brass meets these specs so false shoulder or jamming will provide this fit.</p><p>Secondly this applies to all calibers, others or should I say a lot of reloaders set their dies to generic instructions that came with the die. This is the cause of the biggest percentage of all case separation. My first experience happened approx 10 years into my handloading experience (cost me a buck). Now at over 50 years it hasn't happened since (knock on wood).</p><p>My suggestion to anyone having issues with head separation is to research incipient head separation and shoulder bumping.</p><p>My .02</p><p>Randy</p></blockquote><p></p>
[QUOTE="MNbogboy, post: 1600694, member: 18849"] Perfect question. Most of us will become painfully aware during our reloading career that The main reason for "split" cases (incipient head separation) is over stretching your brass. When forming Ackley cartridges it is important that the case head be held against the bolt head as tbrice23 states. A true Ackley chamber has built in interference (.002-.004) to provide this. This is based on saami spec parent case. Not all brass meets these specs so false shoulder or jamming will provide this fit. Secondly this applies to all calibers, others or should I say a lot of reloaders set their dies to generic instructions that came with the die. This is the cause of the biggest percentage of all case separation. My first experience happened approx 10 years into my handloading experience (cost me a buck). Now at over 50 years it hasn't happened since (knock on wood). My suggestion to anyone having issues with head separation is to research incipient head separation and shoulder bumping. My .02 Randy [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Extracting split cases from chambers
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