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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
NEW 7 SHERMAN SHORT TACTICAL (SST)
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<blockquote data-quote="Rardoin" data-source="post: 2088648" data-attributes="member: 114954"><p>Correct....there is enough 'play' between the extractor lip and the rim to allow forward movement of undersized brass. For this reason Ackley Improved chambers are designed to be cut about 0.004" short of the case head to neck/shoulder junction so that area binds upon chambering a parent case and forces the case head against the bolt face. Hard jamming the bullet is another way of accomplishing the same task as is making a false shoulder on some cases (such as the Dasher). Either way, during fireforming, regularly grease the lugs to reduce the chance of galling. I re-grease every 15rds or so when forming forming cases that have increased shoulder angles....such as the 7SS.</p></blockquote><p></p>
[QUOTE="Rardoin, post: 2088648, member: 114954"] Correct....there is enough 'play' between the extractor lip and the rim to allow forward movement of undersized brass. For this reason Ackley Improved chambers are designed to be cut about 0.004" short of the case head to neck/shoulder junction so that area binds upon chambering a parent case and forces the case head against the bolt face. Hard jamming the bullet is another way of accomplishing the same task as is making a false shoulder on some cases (such as the Dasher). Either way, during fireforming, regularly grease the lugs to reduce the chance of galling. I re-grease every 15rds or so when forming forming cases that have increased shoulder angles....such as the 7SS. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
NEW 7 SHERMAN SHORT TACTICAL (SST)
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