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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning tool & Advice please
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<blockquote data-quote="Bart B" data-source="post: 342930" data-attributes="member: 5302"><p>I disagree with the statement: "And don't qualify with brass weighing, as this may not correlate to capacity(unless it's leaves the pack in an extreme)." Case weight always correlates to "capacity" at peak pressure when the case is pressed hard against the chamber walls and bolt face. </p><p></p><p>Cartridge brass is typically the same metals in the same proportions. Some's thicker walled than others. And there's a difference in hardness. But the mass is virtually equal across all of them; about 2163 grains per cubic inch. The volumn of the brass itself is subtracted from the volumn of the chamber and what's left is the volumn of the powder burning space behind the chamber's mouth which means the working capacity of the chamber won't ever change unless the weight (volumn, mass) of the case does.</p><p></p><p>So weigh your brass then sort 'em into a 1% spread of their average weight. That's close enough to shoot as accurate as the rest of the stuff is to put the bullet where you want it.</p></blockquote><p></p>
[QUOTE="Bart B, post: 342930, member: 5302"] I disagree with the statement: "And don't qualify with brass weighing, as this may not correlate to capacity(unless it's leaves the pack in an extreme)." Case weight always correlates to "capacity" at peak pressure when the case is pressed hard against the chamber walls and bolt face. Cartridge brass is typically the same metals in the same proportions. Some's thicker walled than others. And there's a difference in hardness. But the mass is virtually equal across all of them; about 2163 grains per cubic inch. The volumn of the brass itself is subtracted from the volumn of the chamber and what's left is the volumn of the powder burning space behind the chamber's mouth which means the working capacity of the chamber won't ever change unless the weight (volumn, mass) of the case does. So weigh your brass then sort 'em into a 1% spread of their average weight. That's close enough to shoot as accurate as the rest of the stuff is to put the bullet where you want it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning tool & Advice please
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