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Rifles, Reloading, Optics, Equipment
Reloading
Federal 308 Gold Medal Match Powder?
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<blockquote data-quote="Bart B" data-source="post: 738348" data-attributes="member: 5302"><p>Diamondback, regarding that Sartorius GD503 Class II Balance for around $1000 measuring to 0.005 grain or half a granule of Varget, proving that accuracy in charge weight needs a rifle cartridge shooting system that produces less than .01 MOA accuracy at worst to see with 95% confidence in the numbers that a .005 grain difference in charge weight of any powder that will show any difference.</p><p></p><p>Good luck finding a lot of primers whose detonation characteristics have small enough spread to not mask the charge weight's spread. And a firing pin and spring system consistant enough to smack primers with exactly the same force each time instead of the normal several ounce spread they have.</p><p></p><p>Better yet, good luck getting case mouth tension uniform enough so it produces exactly the same pressure curve parameters for each shot so the muzzle velocity will be +/- 1 fps and barrel time will be +/- 2 microseconds.</p><p></p><p>And finally, finding a lot of perfectly matched bullets with 100% uniform homogenous jacket metal, shape, weight and balance that'll shoot well enough to make all the other variables visible.</p></blockquote><p></p>
[QUOTE="Bart B, post: 738348, member: 5302"] Diamondback, regarding that Sartorius GD503 Class II Balance for around $1000 measuring to 0.005 grain or half a granule of Varget, proving that accuracy in charge weight needs a rifle cartridge shooting system that produces less than .01 MOA accuracy at worst to see with 95% confidence in the numbers that a .005 grain difference in charge weight of any powder that will show any difference. Good luck finding a lot of primers whose detonation characteristics have small enough spread to not mask the charge weight's spread. And a firing pin and spring system consistant enough to smack primers with exactly the same force each time instead of the normal several ounce spread they have. Better yet, good luck getting case mouth tension uniform enough so it produces exactly the same pressure curve parameters for each shot so the muzzle velocity will be +/- 1 fps and barrel time will be +/- 2 microseconds. And finally, finding a lot of perfectly matched bullets with 100% uniform homogenous jacket metal, shape, weight and balance that'll shoot well enough to make all the other variables visible. [/QUOTE]
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Federal 308 Gold Medal Match Powder?
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