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Rifles, Reloading, Optics, Equipment
Reloading
Known Loads too hot now..why
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<blockquote data-quote="Pdvdh" data-source="post: 384766" data-attributes="member: 4191"><p>If one accepts the perspective that the sidewalls of a cartridge case, when bone dry, prevent the case head from contacting the bolt face under full force/thrust created by the pressures within the cartridge, then excessive headspace in a chamber should not result in case head separations.</p><p></p><p>Truth is that cartridge case sidewalls are not strong enough in tensile strength to prevent the case head from slamming backward into the bolt face no matter how bone dry the exterior of the cartridge or the interior of the chamber. A fellow could solder the forward 7/8ths of the casing to the chamber and the case head will still separate under the force of repeated firings if the casing headspace is too sloppy.</p><p></p><p>Which means -> look for another cause of higher pressures.</p><p></p><p>PS: If anything I'd prefer to have less friction between the cartridge sidewalls and the chamber. Less friction might allow the casing to slide back into full contact with the bolt face prior to maximum bolt thrust force, reducing the likelihood of case head separations - but I doubt it. It all happens too quickly. I'll still take less friction over more any day, to enable easy fired-case extraction compared to harder fired-case extraction.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 384766, member: 4191"] If one accepts the perspective that the sidewalls of a cartridge case, when bone dry, prevent the case head from contacting the bolt face under full force/thrust created by the pressures within the cartridge, then excessive headspace in a chamber should not result in case head separations. Truth is that cartridge case sidewalls are not strong enough in tensile strength to prevent the case head from slamming backward into the bolt face no matter how bone dry the exterior of the cartridge or the interior of the chamber. A fellow could solder the forward 7/8ths of the casing to the chamber and the case head will still separate under the force of repeated firings if the casing headspace is too sloppy. Which means -> look for another cause of higher pressures. PS: If anything I'd prefer to have less friction between the cartridge sidewalls and the chamber. Less friction might allow the casing to slide back into full contact with the bolt face prior to maximum bolt thrust force, reducing the likelihood of case head separations - but I doubt it. It all happens too quickly. I'll still take less friction over more any day, to enable easy fired-case extraction compared to harder fired-case extraction. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Known Loads too hot now..why
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