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Rifles, Reloading, Optics, Equipment
Reloading
Weight sorting Magnum brass
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<blockquote data-quote="Bart B" data-source="post: 261315" data-attributes="member: 5302"><p>Smallest series of 10-shot groups at 600 yards I know of were all shot with unweighed .308 win. brass (WCC58 [a military headstamp?]) that had a spread of 1.5 grains on an average of about 151 grains. About 10 groups were fired. Groups ranged from about 3/4ths inch to 1-1/2 inches. Cases were full-length sized and fired from a machine rested Hart barreled Winchester M70 in a wood stock. Happened in 1971. One of the medium sized groups was shown in a 1971 issue of the NRA's American Rifleman in an advertisement for Lapua 185-gr. rebated base match bullets which were used in the test.</p><p></p><p>Almost as good was a test group shown in a late 1991 Handloader magazine story about .308 Win. handloads using new, virgin Winchester brass. Those cases weighed about 170 grains and had a 3 grain spread and no neck turning was done. They even used metered charges of IMR4895 having a charge spread of about 3/10ths grain. Someone grabbed a 20 round box at random then shot 'em in another machine rested Win. 70. All of 'em went inside 2.7 inches . . . at 600 yards.</p><p></p><p>I think there's stuff more important to handloading good ammo than weighing powder and cases.</p></blockquote><p></p>
[QUOTE="Bart B, post: 261315, member: 5302"] Smallest series of 10-shot groups at 600 yards I know of were all shot with unweighed .308 win. brass (WCC58 [a military headstamp?]) that had a spread of 1.5 grains on an average of about 151 grains. About 10 groups were fired. Groups ranged from about 3/4ths inch to 1-1/2 inches. Cases were full-length sized and fired from a machine rested Hart barreled Winchester M70 in a wood stock. Happened in 1971. One of the medium sized groups was shown in a 1971 issue of the NRA's American Rifleman in an advertisement for Lapua 185-gr. rebated base match bullets which were used in the test. Almost as good was a test group shown in a late 1991 Handloader magazine story about .308 Win. handloads using new, virgin Winchester brass. Those cases weighed about 170 grains and had a 3 grain spread and no neck turning was done. They even used metered charges of IMR4895 having a charge spread of about 3/10ths grain. Someone grabbed a 20 round box at random then shot 'em in another machine rested Win. 70. All of 'em went inside 2.7 inches . . . at 600 yards. I think there's stuff more important to handloading good ammo than weighing powder and cases. [/QUOTE]
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Weight sorting Magnum brass
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