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Rifles, Reloading, Optics, Equipment
Reloading
Case head expansion (CHE), reloader's signs of pressure
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<blockquote data-quote="Alibiiv" data-source="post: 1734943" data-attributes="member: 69192"><p>I recently read an article about that described measuring case head expansion (thick section of the case just in front of the base of the case) to be a reloader's way to "measure" chamber pressures. The article then proceeds to state that the principle behind this to be that if there is "X" amount of expansion it means that there is "Y" pounds per square inch.</p><p></p><p>The article further states that without a "standard" such as measuring a factory case of the same caliber before and after firing, CHE really cannot be determined. And another postulate tries to determine whether the CHE should be conducted on once-fired cases or new cases.</p><p></p><p>I find CHE interesting because I have a wildcat that I am trying to develop loads for, .270 Ackley Improved, and cannot even find load data <u><em>(minimal at best)</em></u> for this cartridge and would like some form of standard while finding a load for the cartridge without going over safe limits.</p><p></p><p>What are other's thoughts, ideas and/or experiences with this process/concept?</p></blockquote><p></p>
[QUOTE="Alibiiv, post: 1734943, member: 69192"] I recently read an article about that described measuring case head expansion (thick section of the case just in front of the base of the case) to be a reloader's way to "measure" chamber pressures. The article then proceeds to state that the principle behind this to be that if there is "X" amount of expansion it means that there is "Y" pounds per square inch. The article further states that without a "standard" such as measuring a factory case of the same caliber before and after firing, CHE really cannot be determined. And another postulate tries to determine whether the CHE should be conducted on once-fired cases or new cases. I find CHE interesting because I have a wildcat that I am trying to develop loads for, .270 Ackley Improved, and cannot even find load data [U][I](minimal at best)[/I][/U] for this cartridge and would like some form of standard while finding a load for the cartridge without going over safe limits. What are other's thoughts, ideas and/or experiences with this process/concept? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Case head expansion (CHE), reloader's signs of pressure
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