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Rifles, Reloading, Optics, Equipment
Reloading
Brass life expectantcy?
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<blockquote data-quote="Bart B" data-source="post: 390919" data-attributes="member: 5302"><p>There's lots of reloading myths in the shooting sports. And thin brass not being good for high pressure loads (above 45,000 cup, 50,318 psi) is another one. Consider the following.</p><p></p><p>Western Cartridge Company loaded some .308 Win. match ammo for the US Olympic Team's free rifles back in 1958. Those cases weighed only 150 grains. Thinnest ones ever used for this cartridge. Loaded with a 200-gr. FMJ boattail bullet and a special lot of ball powder, muzzle velocity was around 2500 fps from a 26-inch barrel. These thin cases headstamped WCC58 were probably the most uniform .308 Win. cases ever made.</p><p></p><p>Popular with high power rifle competitors who could get them, favorite loads were 42 grains of IMR4064 under a Sierra 190 getting almost 2600 fps in 26 to 28 inch barrels. Peak pressure was in the 55,000 cup (65,500 psi) range. Using full length sizing dies that reduced fired case body diameters and setting shoulders back only 2 to 3 thousandths, getting 30 to 50 reloads per case was normal. And few folks annealed their case necks. Many matches were won and records set with this load. It was probably the most accurate load the .308 Win. ever produced.</p></blockquote><p></p>
[QUOTE="Bart B, post: 390919, member: 5302"] There's lots of reloading myths in the shooting sports. And thin brass not being good for high pressure loads (above 45,000 cup, 50,318 psi) is another one. Consider the following. Western Cartridge Company loaded some .308 Win. match ammo for the US Olympic Team's free rifles back in 1958. Those cases weighed only 150 grains. Thinnest ones ever used for this cartridge. Loaded with a 200-gr. FMJ boattail bullet and a special lot of ball powder, muzzle velocity was around 2500 fps from a 26-inch barrel. These thin cases headstamped WCC58 were probably the most uniform .308 Win. cases ever made. Popular with high power rifle competitors who could get them, favorite loads were 42 grains of IMR4064 under a Sierra 190 getting almost 2600 fps in 26 to 28 inch barrels. Peak pressure was in the 55,000 cup (65,500 psi) range. Using full length sizing dies that reduced fired case body diameters and setting shoulders back only 2 to 3 thousandths, getting 30 to 50 reloads per case was normal. And few folks annealed their case necks. Many matches were won and records set with this load. It was probably the most accurate load the .308 Win. ever produced. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Brass life expectantcy?
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